Showing posts with label dialectic. Show all posts
Showing posts with label dialectic. Show all posts

30 Mar 2015

Somers-Hall, (1.9), Deleuze’s Difference and Repetition, ‘1.9 Hegel (44–6/54–6, 51–3/62–4)’, summary


by
Corry Shores
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[The following is summary. All boldface, underlining, and bracketed commentary are my own. Proofreading is incomplete, so please forgive my typos and other distracting mistakes. Somers-Hall is abbreviated SH.]



Summary of


Henry Somers-Hall


Deleuze’s Difference and Repetition:
An Edinburgh Philosophical Guide


Part 1
A Guide to the Text

 

Chapter 1. Difference in Itself

1.9 Hegel (44–6/54–6, 51–3/62–4)





Brief summary:

Hegel’s dialectic is an infinite movement. But it also generates the categories we use in representational thinking. Therefore, it is infinite representation, unlike the finite representation of Aristotle, which fixes things in a stable system of definitional limits. Nonetheless, 1) Hegel’s infinite representation still has a pattern-instance structure similar to Aristotle’s genus-species structure, 2) it makes no room for the uniqueness and singularity of each moment, since each in a sense is contained in or born out of prior states, and 3) the real world is too complicated and full of ambiguity to admit of Hegel’s system of cleanly distinct opposites.

 



Summary


[We previously made a general and brief distinction between finite and infinite representation.] Now we will begin by looking at two ways of putting the infinite representational approach into practice (44), namely, 1) Hegel’s synthetic approach, and 2) Leibniz’ manner of seeing “objects as fully defined by an infinite number of properties, thus making truths about them analytic” (44). [Perhaps the distinction here is something like the following. For Leibniz, objects from the beginning possess all their predicates, but there are infinitely many. So things still have a subject-predicate representational structure, but it is infinite. Hegel maybe would see things as part of a developmental movement by which they progressively obtain newer predications or traits or maybe substantialities, but infinitely so. Aristotle’s method of finitely fixing to things sets of properties without taking into account their development is what presents his problems, in Hegel’s view. The real totality is not all that is but rather the entirety of the movement which develops all that is in this motion of infinite becoming.]

In the case of Hegel, therefore, this means that the kind of thinking which has characterised representation so far is only a moment in a wider movement of thought. Thus, finite thinking, or ‘the understanding’ in Hegel’s terms, the mode of thought of Aristotle, is really just a single moment in a broader process called speculative reason. It is only by reifying specu- | lative thought that we end up with the problems we have encountered so far; that is, by denying that there is a greater moment to representation than finite representation, we find ourselves unable to explain the concept of totality.
(44-45)


Hegel’s infinite representation involves his notion of dialectic, which examines the development of concepts rather than seeing their senses as fixed.

Central to Hegel’s explanation of infinite representation is the notion of dialectic. Essentially, Hegel wants to argue that rather than the meanings of terms simply being given by definition, we find when we analyse the movement of thought thinking these terms that their meaning arises from the content itself.
(45)

[In his Science of Logic, Hegel shows this dialectical movement of concepts by tracing it to its origins in indeterminate being. See this entry on a text by Graham Priest for an explanation and quotation of the passages of the Hegel text. The idea is that even if we start with the most basic concept, indeterminate being, just by conceptualizing it, we obtain another concept, indeterminate nothing. Why? Well, try to think being in its purity, and with no reference to any beings, that is, with no determination whatsoever. What comes into your mind? Probably nothing comes into your mind. Voilà. The concept of nothing comes into your mind when you think the most basic concept, being. There is a dynamic built into this concept. Specifically we think indeterminate nothing, since we are not thinking some specific instance of nothingness or some particular negation of a being. But conceptually speaking, what is there to distinguish indeterminate being and indeterminate nothing in our minds? We conceive them as different notions. But each’s content is hard to unravel from the other’s, since both in a sense are empty of any determinate content. So, the first dynamic of thought is the production of opposition: being produces nothing, conceptually speaking. Next, there is a collapse of the two opposite concepts. So now see if this works for you. First conceive pure indeterminate being again, which should again bring to your mind the concept of pure indeterminate nothing. Now notice how they are individual and opposite concepts but are somehow difficult to pull apart on the basis of the conceptual content. The experience we are supposed to have now I am guessing is that we conceive the one rolling over into the other and that rolling back over into the first and so on. We think being, which makes us think nothing, which collapses back to being, which falls back to nothing, and so on. Their genetic pairing produces endless revolution. Voilà. We now have a third concept, arising from the mutual collapsing of the opposing first two, namely, we have the concept of pure becoming. Why? Because that is what happens in our mind when these concepts genetically produce and conflict with one another. The concepts are in a continual state of becoming their opposites. I have not studied the next step very well, but it might be something like this. At this point, we have the notion of becoming arising from the dynamic activity of the most basic ideas we can conceive. We have a dynamic unity of being and nothingness. But note that being at least in Aristotle is also understandable as ‘unity’. What do all beings share? They are all what they are. They are unified self-same things and they are not other to themselves (in this conception). Here now we have a unity (of being and nothing), so do we return to the indeterminate being of the first step? Perhaps we might consider indeterminate being also as indeterminate unity. But that is not what we have now at this stage of the dialectic movement. We specifically have the unity of being and nothing, and not the unity of anything whatsoever. So the concept of becoming leads to the notion of determinate unity, which is what? If something were determinate, we are dealing no longer with being in general but with some being in particular, and for that reason, perhaps the idea is that we are dealing with some existing thing. So the notion of determinate unity is also the notion of existence, perhaps. The concept of becoming (specifically of the becoming of being and nothing) gives rise to the concept of existence. I am not sure if becoming and existence are opposites and if they also dialectically sublate. But perhaps determinate existence is somehow incompatible with pure becoming, since pure becoming is more like a process of change, where determinate existence is something that may be lasting more than a timeless instant. At any rate, normally Hegel’s dialectic is thought to continue the same pattern, sometimes given the terms thesis, antithesis, and synthesis. The sublated third ‘category of thought’ (in our example ‘becoming’) will give rise to its opposite (which may be existence), and they will themselves produce yet another third category, and so on. The process supposedly ends with a final Absolute Idea (the Notion).]

Central to Hegel’s explanation of infinite representation is the notion of dialectic. Essentially, Hegel wants to argue that rather than the meanings of terms simply being given by definition, we find when we analyse the movement of thought thinking these terms that their meaning arises from the content itself. Hegel’s Science of Logic therefore traces the development of concepts from the simplest concept, that of pure, undifferentiated being, through to what he calls the Absolute Idea, or the Notion. By tracing the development of ideas themselves, we are able to see the inherent connections between them. Philosophy is therefore this movement of concepts themselves.
(45)

[The next part is very difficult for me to grasp. It seems we are saying the following. Normally we understand the infinite as what is not finite. But that is to limit the concept by saying what it is not. This means that the concept for the infinite is itself a finite concept. I am not sure why this is a problem. Do all concepts as concepts need to have the same properties as that which they are concepts of? Is the concept for red itself somehow a red concept? But it does help clarify what a finite representation is. Perhaps Hegel is interested not just in a representation of the infinite, but in an infinite representation. In other words, he wants something to have representational powers without being finitely limited like how Aristotelian representations are limited by definitional distinctions. I now must guess to the next notion here. Recall from our commentary above how when we think ‘being’ we thereby think its opposite ‘nothing’, which collapses back to being, and they keep revolving endlessly. This gives us the notion of becoming, but also, it is based on this ceaseless exchanging of opposites. The same could be happening when we think the concept of infinite. It is not the finite. We think the finite. It is not the infinite. They are co-definitional, and they keep exchanging one to the next over and over without end. This movement is perhaps part of the dialectical interactions of all opposites, but SH is only here discussing the pairing infinite/finite. This circle of revolution it seems is itself infinite, in that it has no beginning or end. Likewise, we might also think that if the absolute is a limit that comes after an infinite and not a finite progress, then the whole dialectic itself is infinite. I am not sure about that, since any ending would constitute a limit. At any rate, the very basic idea here seems to be that the dialectic is representational, because it generates the categories of understanding, by which we form judgments, and I think SH is saying judgments based on such categories are the form of representation. And also, in some important sense, perhaps the dynamics of this are endless and therefore infinite. So it is infinite representation. (I am still not sure why the ceaselessness of the movement is not understanding something by means of limits. Hegel speaks of its beginninglessness and endlessness. Are not beginnings and endings limits? They are not conceptual limits like a definition makes, but they still define the limits of a process or movement. And so, if something is ceaseless, since it is beginningless and endless, then we are defining its infinity by means of a negation of confining limits, that is, by saying that it has no end and no beginning and is in that way limitless.) Furthermore, we need to get to the idea that “Such a process involves seeing the infinite as essentially a contradictory structure – the identity of identity and difference” (SH 46). I am not sure how we get here yet. The simplest possibility I can think of is that somehow, perhaps later in the chain of categories, we arrive at identity which gives rise to its opposite difference. They collapse into one another, which would be like their identification with one another, and thus it would be the identification of identity and difference. The other way I can think of for getting to this notion would be is if even in a pairing like being and nothing we have an identification of identity and difference. I am not sure how. Perhaps the idea would be, it is the identity of indeterminate being, its meaning and its being just what it is conceptually, that gives rise to what is different from it. In other words, to be what one is, to have an identity, is also to differ from oneself. At any rate, the next idea is that the finite is in a perpetual process of vanishing or negation. I think this is simply the fact that any dialectical pairing would be a finite representation, but these dialectically give rise to others. So the finite representations always vanish, and this happens perpetually.]

For Hegel, therefore, the problems of finite representation emerge when we ignore this movement, and assume that concepts are just given. In this way, Hegel criticises his predecessors as follows [the following up to citation is Hegel quotation]:

Such presuppositions that infinity is different from finitude, that content is other than form, that the inner is other than the outer, also that mediation is not immediacy (as if anyone did not know such things), are brought forward by way of information and narrated and asserted rather than proved. (Hegel 1999: 41)

Finite representation therefore emerges for Hegel from the fact that we take for granted the nature of the distinction between the finite and the infinite. We presume that: ‘There are two worlds, one infinite and one finite, and in their relationship the infinite is only the limit of the finite and is thus only a determinate infinite, an infinite which is itself finite’ (Hegel 1999: 139–40). If we just view the infinite as a ‘beyond’ of the finite, and remain with finite thinking, however, we end up with an infinite which is itself limited, and hence is finite: ‘Owing to the inseparability of the infinite and the finite – or because this infinite remaining aloof on its own side is itself limited – there arises a limit; the infinite has vanished, and its other, the finite, has entered’ (Hegel 1999: 141). The heart of the difficulty is that the infinite is supposed to be that which is beyond limitation, but the basic structure of determining the infinite is by opposition, in other words by saying what the infinite is not. But by doing so, we introduce a limit into the notion of the infinite. Possessing a limit, however, is what defines finite things. For this reason, Hegel defines this understanding of the infinite as a ‘spurious infinite’ (Hegel 1999: 142). | We attempt to determine the infinite as a beyond, but in determining it, we limit it and make it finite. We thus have an infinite progression and alternation between finite and infinite terms. If we are truly to understand the infinite, and hence the finite, we need to see both as moments of one process [the following up to citation is Hegel quotation]:

The image of the progress to infinity is the straight line, at the two limits of which alone the infinite is, and always only is where the line – which is determinate being – is not, and which goes out beyond to this negation of its determinate being, that is, to the indeterminate; the image of true infinity, bent back into itself, becomes the circle, the line which has reached itself, which is closed and wholly present, without beginning and end. (Hegel 1999: 149)

The true infinite emerges when we step back from attempting to formulate the infinite through the progression, and recognise that the process of the circular movement of the finite into the infinite and back again is itself the infinite. Such a process involves seeing the infinite as essentially a contradictory structure – the identity of identity and difference. The finite is in a perpetual process of vanishing or negation, and this movement itself is seen as the infinite. Everything therefore falls under conceptual determination. Hegel’s claim is thus that it is only by moving to a different way of understanding concepts, namely speculative reason, that we are able to truly understand either of the categories of finitude or infinitude.
(SH 45-46)


[The next part is a bit hard for me to grasp. We will look at Deleuze’s criticism of Hegel’s infinite representation. We need to see how Hegel pushes difference past opposition to contradiction. I am not sure how this is so, since I would have assumed that anything in opposition is also in contradiction. Perhaps the difference is that opposing things do not necessarily negate one another (or imply the falsity of the other), but contradictory things do. Let us take the example of being and nothing. We can say they are opposed. But we are not necessarily saying just yet that they are in contradiction. So again, perhaps the difference is that opposition here means somehow being incompatible or non-identical in some problematic way, but contradiction implies additionally the negation of one by the other. Hegel takes oppositions but says they sublate negationally on account of their mutual contradictoriness. But I am not sure if I interpret this correctly. The next idea is that Hegel’s dialectical movement seems univocal since there is just one process that is generative of many categories; however, it really is not. I do not understand why yet. And I cannot understand why yet from the quotation in Spinoza: Practical Philosophy. It has something to do with the organization of a Form and the formation of subjects. I am not sure, but maybe the problem is that the dialectic is univocal but it is used to explain distinct subjectivities and maybe substances, and is therefore really somehow equivocal. I will quote:]

What, therefore, is the relationship between the infinite and finite that Hegel develops? Deleuze’s claim is that infinite representation is no better than finite representation. In distinguishing the two, he writes that ‘it treats identity as a pure infinite principle instead of treating it as a genus, and extends the rights of the concept to the whole instead of fixing their limits’ (DR 50/61). The finite and the infinite are still understood oppositionally, as each is not the other, but at the same time, they are united together, in that they are part of one process. Now, if two terms are opposed to each other, but are both asserted simultaneously, then we have a contradiction. This is why Deleuze claims (and Hegel would agree) that speculative reason operates by pushing difference past opposition to contradiction. In that everything is one element (the infinite), it appears as if we have a univocal theory much like Spinoza’s. In actual fact, however, Hegel’s theory preserves the central features of representation: ‘Goethe, and even Hegel in certain respects, have been considered Spinozists, but they are not really Spinozists, because they | never ceased to link the plan[e of infinite representation] to the organization of a Form and to the formation of a Subject’ (SPP 128–9).
(SH 46-47)


SH then explains that Deleuze offers three criticisms to Hegel’s approach. 1) Because Hegel uses language and words, he is using finite representations and thus never escapes finite representation. [The next point about the universal I have difficulty grasping. I am not sure what the universal has to do with Hegel’s dialectic, at least as the term is meant here. Perhaps the dialectic is universal because all things come about through it. Then we need to somehow add into this the concept of the singular, which is neither particular nor universal. It seems Kierkegaard’s Abraham is singular. Recall SH’s discussion of this. God’s command goes against the categorical imperative, which is a universalization of moral behavior. Let us work with the categorical  imperative first. We should not steal, because if everyone did, there would be no sense of property, and thus no stealing would be possible anyway. The prohibition against stealing then is universal. Any one instance of stealing or choosing not to steal is a particular instantiation of that universal. So actual acts relevant to stealing are particulars to the universal. But Abraham’s intent to kill his son is not relevant to the universal, since God’s command overrides the universal (the categorical imperative would say ‘never murder’). It is also not a particular, since it is not one of many common instances relative to the universal prohibition against murder. It is a unique and singular situation, given that God very uncharacteristically makes this cruel and illicit demand. So for this reason perhaps it is singular rather than particular. Even with this in mind, I am not quite sure I grasp the point here yet. Perhaps SH is saying that for Deleuze, to see every moment as part of a universal movement is to not notice its absolute uniqueness and singularity. Maybe the view is that newness is radically new. It comes out of nowhere. It is not implied or somehow otherwise contained in the prior moment. Each moment is not an instantiation of some greater pattern. Each moment is singular and unique unto itself. I will quote:]

Deleuze makes three main criticisms of this approach. First, ‘[Hegel] creates movement, even the movement of the infinite, but because he creates it with words and representations, nothing follows’ (DR 52/63). Deleuze’s claim is that Hegel has misunderstood the cause of the movement of thought by continuing to represent it, rather than seeing it as escaping representation. The aspect of representation which Deleuze takes to be critical here is the universal. ‘“Everyone” recognises the universal because it is itself the universal, but the profound sensitive conscience which is nevertheless presumed to bear the cost, the singular, does not recognise it’ (DR 52/63). The singular, or singularity, which is neither particular nor universal, is excluded by beginning with a term which is essentially universal. We can return to the figure of Abraham. Abraham cannot be understood within the framework of the universal, which is the precise reason for Kierkegaard’s introduction of him in Fear and Trembling.
(SH 47)


Now for the second criticism. 2) [I do not understand this one very well yet. It seems to be that Hegel’s dialectic never breaks from the genus-species model and thus still has the problems of Aristotle’s representational system. The way it keeps this Aristotelian model seems to be that all the movement revolves around a basic concept of the infinite as beginningless/endless ceaseless movement. It is not a definitional sort of structure. But it does seem to regard all particulars as instances of a common pattern or dynamic. The movement from being to nothing is of the same sort of movement as that from becoming to existence, and so in each and every other instance of the dialectic.]

The second criticism is that this movement is always around a particular point. Deleuze is claiming that Hegel relies on a ‘monocentring of circles’ (DR 49/60) which Deleuze claims comes about through Hegel’s adherence to the species–genus model. In the case of the finite and the infinite, movement ‘revolves’ around the central moment of the true infinite. Hegel has not got rid of the idea of a central identity, therefore.
(SH 47)


Now the third criticism. 3) Hegel’s basic structure of opposition is too crude to apply to the real world where there is much more ambiguity, overlap, mixing, and so on.

The third point, which relates the previous two, is that the idea of opposition, which Hegel uses to unite the particular and universal, is too rough to provide an adequate description of the world. ‘Oppositions are roughly cut from a delicate milieu of overlapping perspectives, of communicating distances, divergences and disparities, of heterogeneous potentials and intensities’ (DR 50/61). That is, Deleuze asserts that simply relying on a reinvigorated understanding of the distinction between finite and infinite will not provide the kinds of fine-grained distinctions needed to describe the world adequately.
(SH 47)

SH ends by noting that we cannot reduce Hegel to Aristotle despite their similarities. Hegel in many ways has responses to the problems of Aristotle’s system, but we do not need to review them for our purposes in this guide (47).

 

 

 

 

 

Citations from:

Somers-Hall, Henry. Deleuze’s Difference and Repetition. An Edinburgh Philosophical Guide. Edinburgh: Edinburgh University, 2013.



Or if otherwise noted:


DR:
[Deleuze] Difference and Repetition, trans. Paul Patton, New York: Columbia University Press, 1994/London: Continuum, 2004.


 

SPP:

[Deleuze] Spinoza: Practical Philosophy, trans. Robert Hurley, San Francisco: City Lights Books, 1988.



Hegel, Georg Wilhelm Friedrich (1999), Science of Logic, trans. A. V. Miller, Amherst, NY: Humanity Books.

 





 

8 Feb 2015

Priest, (8) ‘Dialectic and Dialetheic’, section 8, “Identity in Difference”, summary

 

by Corry Shores
[
Search Blog Here. Index-tags are found on the bottom of the left column.]

[Central Entry Directory]
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[Graham Priest, entry directory]
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[The following is summary. All boldface, underlying and bracketed commentary are my own, unless otherwise indicated.]




Graham Priest


“Dialectic and Dialetheic”


8 Identity in Difference



Brief Summary:

Hegel’s dialectic takes the form of identity in difference, formulable as (a=b)&(a≠b). This is a variation on the dialetheic formulation A&~A.




Summary 


At the end of section 4, Priest noted that although dialetheic logic says that there are true cases of A&~A, this formulation might not apply to Hegel’s dialectics, which calls for a more unified, intimate, internal, intensional relation/contradiction between the terms. He returns now to this issue so to better describe “the exact nature of dialectical contradictions” (410). [First recall what Priest says regarding the dialetheias of nature and spirit in Hegel:

For spirit, s, is | then both spirit and not spirit. In the notation of section 3: (s=s)&(s≠s). Alternatively, nature, n, which is not spirit, is spirit: (n≠s)&(n=s). The existence (truth) of this contradiction allows spirit to think (understand) what it is: spirit and nature, spirit and not spirit; and thus to achieve its telos, in which form it is the Absolute.
(401-402)

] We previously have encountered many contradictions taking the form (a=b)&(a≠b), “something’s being identical with, and different from something (else?)” (410). This is Hegel’s notion of identity in difference. Priest “will now argue that this is the form of a dialectical contradiction, to which all others reduce” (410).


We have also encountered contradictions of the form: (a=a)&(a≠a). “They are obviously of this form” (411) [(a=b)&(a≠b), the form of ‘identity in difference’.] We also encountered the contradiction of something

being identical with its opposite: ^A=^~A. Thus for example, that something, a is free (Fa) is identical to its being bound (not free): ^Fa=^~Fa. This, too is a special form of identity in difference. For, as we noted in section 3, it is always true that ^A≠^~A. Thus, identity of opposites is just the identity in difference (^A=^~A)&(^A≠^~A).
(411)

[Perhaps Priest understands “identity in difference” to mean that both something equals its negation and it does not equal its negation.]


[In this next paragraph, Priest refers to the Tarski T-scheme. Recall that Tarski uses quotations around a sentence to mean the name for that sentence. For example:

“snow is white” is true if and only if snow is white.

In our article here, (see sect.3) Priest is doing something similar with the ^ symbol, meaning we would put ‘that’ in front of the sentence. The basic operations Priest seems he is doing is that if we have a sentence, let us say: snow is white; we can then make it: that snow is white is true iff snow is white. Since snow is white, then we can just say: that snow is white is true. However, we can substitute the  ‘quoted’ or ‘that-ed’ term with its negation, since we equated the two. Thus this means that the negation is true as well.]

In fact, the identity of opposites ^A=^~A is doubly contradictory, since it also gives rise to the contradiction A&~A. For either A or ~A; without loss of generality, suppose the former. Then ^A is true, by the T-scheme (^A is true iff A). But if ^A=^~A, ^A is true implies ^~A is true  (by the substitutivity of identicals). Hence ^~A is true too. It follows that ~A, again by the T-scheme. Thus, both A and ~A.
(411)


[In the above, we began by assuming either only A or not-A. No matter which we assume, the other holds by consequence (when one is also equated to the other). We did not assume a third possibility. It is not completely clear to me how this factors in. It might have something to do with truth gaps, in which a proposition is neither true nor false, and so if A were valueless, we would not say A or not-A. For, it need not be that one is true, since A is valueless. See discussion of valueless statements, and Priest’s defense of the law of excluded middle in these situations, in section 1.3 and section 4.7 of In Contradiction.] One objection to the above reasoning is that it uses the law of excluded middle, but Hegel spoke against it. Priest replies that it is still valid given our semantics (outlined in section 3 of this article), and also that Hegel’s objection to the law is not that it is untrue but rather that it is trivial; “it may be false (as well)!” (411).


Priest will now address two particular cases of identity in difference. The first is “something’s being identical with itself is its being different from itself. This is just the identity of opposites (^a=a)=(^a≠a)” (411). The second is the dialectics of motion that he discussed in section 4. This as well can be understood as the identity of opposites. [[The reasoning here seems to be as follows. Consider an instantaneous state of contradiction. For an object to be in one position is for it to be in another. If it were only in the same position, it would not be in motion. Thus we can equate its being in a position with its not being in that position. Because this affirms both terms, we can conjoin them even though one can be seen as the negation of the other. Priest furthermore says that any such equation of a term with its negation can be seen as one term ‘changing’ into its opposite, perhaps because the equation brings one term upon the other. This is important, because it could explain the collapsing of one term upon the other. In logic this seems to be a mode of substitution. ~A passes into A in the sense that it supplants A, or overlays it. It is also important to note that Priest here distinguishes the equality of opposites with the conjunction. The conjunction does not imply the passing of one into the other, even though the passing of one into the other implies the conjunction of the terms.]]

we may take the instantaneous contradiction produced in a state of motion to be that the body’s being in a certain place is its not being in that place, ^A=^~A. This will imply that it both is and is not in that place, A&~A, as I have just observed. Moreover, because this type of contradiction is identified as a state of change, it is natural to describe any state of the form ^A=^~A as a state where ^A is changing into its opposite ^~A, or vice versa. Thus, the identity of opposites is frequently described in this way, as, for example, the opposites going over into each other.
(411)


So recall again the objection that A&~A does not do justice to the intimacy of the terms in dialectical contradiction. Priest shows how dialectical contradictions take the form (a=b)&(a≠b) [which is a variation on A&~A]. The intimacy here is that the terms are identical.

We have now seen that all the dialectical contradictions we have met are instances of identity in difference: (a=b)&(a≠b). We may therefore take this to be the general form of a dialectical contradiction. This is an excellent way of doing justice to the point we noted in section 4, that the poles of a dialectical contradiction must have a tighter relation than mere extensional conjunction. For the poles of the identity in difference (a=b)&(a≠b), a and b, are actually identical with (though different from) each other; (dialectical) identity is therefore the relationship between the poles of a dialectical contradiction.
(412)



Citations from:

Priest, Graham. ‘Dialectic and Dialetheiç’. Science & Society, 1989/1990, 53 (4) 388–415.


 



 

 

 

 

 

 

Priest, (6) ‘Dialectic and Dialetheic’, section 6, “Contradiction in Hegel’s Dialectic”, summary

 

by Corry Shores
[
Search Blog Here. Index-tags are found on the bottom of the left column.]

[Central Entry Directory]
[Logic & Semantics, Entry Directory]
[Graham Priest, entry directory]
[Priest, “Dialectic & Dialetheic”, entry directory]


[The following is summary. All boldface, underlying and bracketed commentary are my own, unless otherwise indicated.]




Graham Priest


“Dialectic and Dialetheic”


6 Contradiction in Hegel’s Dialectic



Brief Summary:

In Hegel’s dialectical movement, contradictory categories result from one another and are conjoined. It is in this ways that Hegel is a dialetheist [someone who thinks that there exist true contradictions].




Summary 


Previously Priest established, on the basis of his influences, that Hegel is a dialetheist [he believes that true contradictions exist]. Now Priest will examine the role of dialetheias in Hegel’s dialectics. Priest begins by distinguishing three aspects of Hegel’s dialectic.

(1) “the fundamental movement of Geist,” which Priest will call “the global dialectic”,

(2) the local developments by which the fundamental movement of Geist is achieved. Among these local developments is the development of the categories. Priest will call these developments “the logical developments”. And,

(3) the development of people and societies, which Priest will call “the historical dialectics”.
(401)


We begin then with the global dialectic, which Priest says is Hegel’s version of Fichte. (401) [Recall what Priest wrote about Fichte and the ego in the prior section:

there is nothing to think about except itself; and it is impossible to think something unless there is something else to contrast it with. (So at least thought Fichte.) Hence, the self had to create something different, the non-self, against which it could conceive itself. (This is precisely Reason leading a life of its own.) It therefore produces contradiction. Specifically, the non-self must also be self, since nothing else exists. […] as Fichte puts it […]: self = not-self and not-self = self.
(400)

]

The transcendental ego, or spirit (Geist) as it has become, has as its essence, or telos, to think. Since it is all there is, it must think about itself. And since it cannot do this without a contrast, it must create its opposite, nature.
(Priest, citing Taylor, 1975)


[With Fichte, we noted, this dialectic generates a self contradiction: self = not-self.] Just like with Fichte, this situation in Hegel creates a contradictory situation.

For spirit, s, is | then both spirit and not spirit. In the notation of section 3: (s=s)&(s≠s). Alternatively, nature, n, which is not spirit, is spirit: (n≠s)&(n=s). The existence (truth) of this contradiction allows spirit to think (understand) what it is: spirit and nature, spirit and not spirit; and thus to achieve its telos, in which form it is the Absolute.
(401-402)

Priest then notes that nature and spirit do not annihilate one another, but somehow there is resolution [it seems in the sense of solving a puzzle, where the puzzle remains even though it has been solved].

It should be noted that the Absolute is still a contradictory state. Nature and spirit do not annihilate each other; each still exists, requiring the other. In the final state of the dialectic, the contradiction is said to be resolved; or aufgehoben; but as Hegel is often at pains to point out, the state which is aufgehoben continues to exist. Resolution, in this context, is more like the resolution of a puzzle: we know the answer. The puzzle does not cease to be a puzzle; it just ceases to puzzle us. (A riddle is still a riddle even if we all know the answer.)
(402)

[[Note, in another context, regarding “the positive” and “the negative”, Hegel says that their contradiction created by their unity destroys both sides, creating “the Null”. I am not sure at all how this relates to Nature and Spirit, but I think it would be important for the terms to subsist rather than annul one another, for otherwise the conjunction of incompatible terms will not hold.

Thomas Bole, discussing this in his “Contradiction in Hegel's Science of Logic,” writes of the positive and the negative that:

Each pole of contradiction annuls itself and posits its contrary. Both poles are destroyed (WL II, 51:33-35 [SL 433]). Indeed, this mutual self-annihilation by its poles is the “formal determination” (WL II, 51:37 [SL 433]) of contradiction. Thus, “the initial unity which results from contradiction is the Null” (WL II, 51:12-13 [SL 433]); in whatever respect anything can be said to be self-contradictory, it is indeterminate.
(Bole, 525)

In the Giovanni translation, the quoted sentence reads:

In the self-excluding reflection we have just considered, the positive and the negative, each in its self-subsistence, sublates itself; each is simply the passing over, or rather the self-translating of itself into its opposite. This internal ceaseless vanishing of the opposites is the first unity that arises by virtue of contradiction; it is the null.
(Hegel, 376)

In the German:

In der sich selbst ausschließenden Reflexion, die betrachtet wurde, hebt das Positive und das Negative jedes in seiner Selbständigkeit sich selbst auf; jedes ist schlechthin das Ubergehen oder vielmehr das sich Ubersetzen seiner in sein Gegenteil. Dies rastlose Verschwinden der Entgegengesetzten in ihnen selbst ist die nächste Einheit, welche durch den Widerspruch zustande kommt; sie ist die Null.
(67)

]]

There is a long process which leads to the Absolute where thought thinks itself.

The achievement of the Absolute in the global dialectic is not, however, arrived at in a trice. Rather, the production of a category that allows spirit to think itself is achieved only after a period of conceptual evolution, the logical dialectic. The most primitive category, being, produces a contradiction. This contradiction produces a novel category, which is itself contradictory. This, in turn, produces a novel category. And so it goes, until we arrive at the Absolute Idea (Taylor, 1975, 339) – a category which applies to the biggest contradiction of them all, the Absolute. This allows thought to think itself.
(Priest 402)


For Hegel, all categories are contradictory (402).


Priest will take the example of being and becoming to illustrate. [[Priest here seems to be saying this. If something has no properties, it does not have being. Pure indeterminate being has no properties, thus it both has being as being and it does not have being as something without properties. This also means that one of being’s properties is its non-being, and thus the being of being is its non-being. Now we think of a being with no properties. The same would follow that its being is its non-being. I still cannot figure out what things in motion have to do with being propertiless. But let us consider striking a match and wood turning to fire. Insofar as it is wood, it has being, and insofar as it is not-wood, it does not have being. One of its properties is changing from one to the other. So its being is its being both itself and not itself. I am not entirely sure, but it seems he is referring to the opening paragraphs of The Science of Logic. Here I understand Hegel making a slightly different point. We begin with pure being, which has no determination (it is indeterminate). But since it has nothing to determine it, to distinguish it from anything else, it is (conceptually) empty. “There is nothing to be intuited in it”. Thus “Being, the indeterminate immediate is in fact nothing, and neither more nor less than nothing”. So out of the category of pure being arises the category of pure nothingness. It as well is indeterminate. But this means there is nothing to distinguish it from being. We can intuit nothing as being different from being, but we cannot distinguish them in our intuitions. This means “Pure being and pure nothing are therefore the same”. We saw how the category of being “passes over” to nothing, which then “passes over” to being. They are indistinguishable yet not the same, and “each immediately vanishes in its opposite”. This movement of vanishing into its opposite then is what characterizes both of them. And since movement into something’s opposite is its becoming something else, the two categories together give rise to the category of becoming. I will quote from the first three paragraphs of Hegel’s Science of Logic.

Chapter 1
Being
A. Being
Being, pure being – without further determination. In its indeterminate immediacy it is equal only to itself and also not unequal with respect to another; it has no difference within it, nor any outwardly. If any determination or content were posited in it as distinct, or if it were posited by this determination or content as distinct from an other, it would thereby fail to hold fast to its purity. It is pure indeterminateness and emptiness. – There is nothing to be intuited in it, if one can speak here of intuiting; or, it is only this pure empty intuiting itself. Just as little is anything to be thought in it, or, it is equally only this empty thinking. Being, the indeterminate immediate is in fact nothing, and neither more nor less than nothing.

B. Nothing
Nothing, pure nothingness; it is simple equality with itself, complete emptiness, complete absence of determination and content; lack of all distinction within. – In so far as mention can be made here of intuiting and thinking, it makes a difference whether something or nothing is being intuited or thought. To intuit or to think nothing has therefore a meaning; the two are distinguished and so nothing is (concretely exists) in our intuiting or thinking; or rather it is the empty intuiting and thinking itself, like pure being. – Nothing is therefore the same determination or rather absence of determination, and thus altogether the same as what pure being is.

C. Becoming
1. Unity of being and nothing
Pure being and pure nothing are therefore the same. The truth is neither being nor nothing, but rather that being has passed over into nothing and | nothing into being – “has passed over,” not passes over. But the truth is just as much that they are not without distinction; it is rather that they are not the same, that they are absolutely distinct yet equally unseparated and inseparable, and that each immediately vanishes in its opposite. Their truth is therefore this movement of the immediate vanishing of the one into the other: becoming, a movement in which the two are distinguished, but by a distinction which has just as immediately dissolved itself.
(Hegel, 59-60)

]]

it may help to illustrate the process with one example, that of being and becoming (Hegel, 1969, Vol. I, book 1, section 1, ch. 1). Consider being. If something, a, were merely to be, that is, to have no | properties other than being, then there would be nothing to distinguish it from an object that has no properties at all, i.e. , that is not. It would therefore both be and not be, Ba&~Ba (where B is the one place predicate of being). Thus, we are led to a category of things, a, whose being is their non-being ^Ba=^~Ba. These are the things that are coming into being or out of it. (Recall the discussion of change in section 4.) This is therefore the category of becoming.
(Priest, 402-403)


The logical dialectic [by which the categories generate one another dialectically] is not a process in time. But spirit is embodied in nature, and the dialectic unfolds through history. These parts in time are involved in a series of destructions, even though the whole stands. [Here Priest cites Charles Taylor’s book on Hegel. Let me quote some of it first:

Hegel thinks of contradiction as the source of movement because whatever is in contradiction must pass over into something else, be this passage the ontological one between levels of being which go on existing coevally, or the historical one between different stages of human civilization. But it would seem impossible to have it both ways. If contradiction is the source of passage from one level to another, it is because it is fatal to continued existence, or so one would think from the commonsense principle that nothing contradictory can exist. Hegel seems to be using this commonsense principle when he explains dialectical passages in this way. And yet on the other hand things do go on existing (in the chain of being, if not in history) even after being convicted of contradiction, and indeed contradiction is said to be everywhere. How can we reconcile these affirmations?

The answer is that contradiction, as Hegel uses the term, is not wholly incompatible with existence, and as such perhaps does not really deserve the name. When we say that the whole is in contradiction, we mean that it unites identity and opposition, that it is opposed to itself. Perhaps one might want to amend this way of putting it to get over the apparent paradox. We might want to say, for instance, that ‘identity’ and ‘opposition’ are not to be considered incompatible. But to put it this way would miss part of the point, for in a way, | Hegel wants to retain some of the force of the clash between ‘identity’ and ‘opposition’. For Geist is in struggle with himself, with his necessary embodiment, and only comes to realization out of this struggle. So that we would have to say that ‘opposition’ is both compatible and incompatible with ‘identity’.
(Taylor, 105-106)

We can now see more clearly the underlying principle of those ascending dialectics in which Hegel will show that finite things cannot exist on their own, but only as part of a larger whole. The motor of these dialectics is contradiction; and the contradiction consists in this, that finite beings just in virtue of existing externally in space and time make a claim to independence, while the very basis of their existence is that they express a spirit which cannot brook this independence. The ascending dialectic reveals the contradiction in things and shows from the nature of the contradiction how it can only be understood and reconciled if things are seen as part of the self-movement of the Absolute. Thus contradiction, in the strong sense which involves combining ontological conflict with its denial, is mortal. But since this ‘denial’ is not just an intellectual error by us who observe, but is essential to the whole which is in ontological conflict itself, we can see that contradiction in the strong sense is what makes things move and change. It is their inherent changeability (Veränderlichkeit); while contradiction in the sense of ontological conflict is the source of this changeability.

Contradiction is thus fatal to partial realities, but not to the whole. But this is not because the whole escapes contradiction. Rather the whole as Hegel understands it lives on contradiction. It is really because it incorporates it, and reconciles it with identity that it survives. This the partial reality –material object or finite spirit – cannot encompass. It is stuck with its own independent existence, and since this independence clashes with the basis of its existence, it is caught in contradiction and must die. It must die because it is identified with only one term, the affirmation, and cannot encompass the denial.

Not so the whole. The absolute goes on living through both the affirmation and the denial of finite things. It lives by this process of affirmation and denial; it lives via the contradiction in finite things. Thus the absolute is essentially life and movement and change. But at the same time, it remains itself, the same subject, the same essential thought being expressed, throughout this movement. It reconciles identity and contradiction by maintaining itself in a life process which is fed on ontological conflict. This combination of incessant change and immobility is described by Hegel in a striking image from the preface of PhG: ‘The true is thus the bacchanalian whirl in which no | member is not drunken; and because each, as soon as it detaches itself, dissolves immediately - the whirl is just as much transparent and simple repose’ (PhG 39).
(Taylor, 107-108)

]]


The logical dialectic, though a development, is not a process in time. It is, however, connected with one that is. For spirit is embodied in nature, and, particularly, humankind and its social institutions; and these change in the historical dialectic. Each social institution, being a fragment of Geist, reflects its properties to a certain extent. (Rather as the whole of an image is visible in any fragment of a hologram.) In particular, it is contradictory. Thus, it also has its own telos which it must try to achieve by producing a contradictory state. However, unlike the similar maneuver with the whole, this maneuver results in the destruction and replacement of the situation. Contradictions are therefore fatal to parts of the whole (finite beings); not so the whole itself (Taylor, 1975, 105ff). It follows that the state which succeeds the old does not transcend (aufhebt) it in quite the same way that the Absolute transcends the spirit/nature contradiction. In particular, the old contradiction is no longer true (though new ones will be).
(Priest 403)


Hegel has the famous example for this, the master-slave relationship. People need recognition from others in order to develop themselves. At first they obtain it by force and enslave the other to obtain their recognition. But since this dehumanizes the other, the master cannot be recognized by someone who really matters to him. The slave, meanwhile, labors and [somehow] gains control of the world, granting him/her freedom. Also, the slave knows they can be killed any moment, granting them greater self-awareness, also allowing them to become aware of their freedom. By those means, the slave is on the road to overthrowing the master. (403)


As we can see, the slave in the enslaved situation is in a contradictory state, as “he is both free and bound (not free)” (404). Priest further illustrates with a passage by Sartre where he explains that the Nazi oppression only heightened their awareness of the freedom they should and really deep down do have. (404)

There is an objection that these dialectical sorts of contradiction are not really contradictory, since it is free in one sense and bound in another. Priest admits that some contradictions that dialetheists cite are merely apparent contradictions and are “dispelled once the respects in which the contradictory predicates apply are spelled out” (404).


Priest also replies that it is not always so clear that two senses of the same term are meant.

The quotation from Sartre illustrates this. What are the senses in which the occupied, people were free and not? They were not free in that they could not, because of the occupation, do exactly as they chose. But, as Sartre stressed, this made them realize that they could do exactly as they chose. But this is no consistent disambiguation: it is just as contradictory.
(404)

The trouble here is that the notion of having a choice does not have the crystal precision of, e.g., mathematical predicates.
(405)



Citations from:

Priest, Graham. ‘Dialectic and Dialetheiç’. Science & Society, 1989/1990, 53 (4) 388–415.


Or if otherwise noted:

Bole, Thomas J. “Contradiction in Hegel's Science of Logic.” The Review of metaphysics 40, no. 3 (1987): 515-534


Hegel, Georg Wilhelm Friedrich. The Science of Logic, edited and translated by George di Giovanni. Cambridge: Cambridge University, 2010.


Hegel, Georg Wilhelm Friedrich. Wissenschaft der Logik II. Frankfurt: Suhrkamp, 1969.
 

Taylor, Charles. Hegel. Cambridge: Cambridge University, 1975.

 

 

 

 

 

Priest, (5) ‘Dialectic and Dialetheic’, section 5, “The History of Hegel’s Dialectic”, summary

 

by Corry Shores
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[The following is summary. All boldface, underlying and bracketed commentary are my own, unless otherwise indicated.]




Graham Priest


“Dialectic and Dialetheic”


5 The History of Hegel’s Dialectic



Brief Summary:

If we look at three of Hegel’s influences – Neo-Platonists, Kant, and Fichte – we see that Hegel borrowed self-contradictory ideas from each of them. Thus Hegel is a dialetheist, that is, he believes that true contradictions exist.




Summary 


Priest will now offer a dialetheic interpretation of Hegel and Marx’s ideas on dialectic.

I will argue historically: given the philosophical influences acting on Hegel and Marx, and what Hegel, in particular, says about them, there is no other very sensible interpretation.
(398)


One of Hegel’s major influences were “medieval (and especially Christian) Neo-Platonists and their Renaissance successors” (398). The Neo-Platonists held contradictory true things about the One, for example, that it is everything and nothing, everywhere and nowhere. Hegel’s concept of the absolute was influenced by this Neo-Platonic concept of the One.


Another of Hegel’s influences is Kant. In his Critique of Pure Reason, Kant has a section called the ‘Antinomy of Pure Reason’. Here there are four pair of arguments, each one contrary to its partner, but neither of each pair is fallacious on its own. (399) But Kant is not using dialectical logic, because he diagnoses a flaw in the antinomies. The flaw is that they apply a category outside its legitimate bounds. Priest takes as an example, “everything has a cause”. [Priest seems to be saying here that Kant’s reasoning is that “everything has a cause” belongs to objects of intuition, but “the World” is only apprehended by reason. Therefore, we cannot apply “everything has a cause” to “the World.”] (399)


Kant uses the antinomies to show that reason and its categories depend on experience to provide it content (399). Priest says “It is difficult to find direct arguments for this assumption, other than some very strong form of positivism (such as Hume’s)” (399). [I am not sure what Priest means here, perhaps that the best argument Kant has, or that we can provide him, is that in all cases we seem always to get our conceptual content from experience.] But if we reject this hypothesis, then reason, in its independence from experience, generates contradictions. This is the route that Kant’s successors took. [I am not sure if Priest here is referring to German Idealists or perhaps some other group like neo-Kantians]. Priest then provides a long quote by Hegel where he makes this point. [I will just place a couple sentences in the following.]

The blemish of contradiction, it seems, could not be allowed to mar the essence of the world; but there could be no objection to attaching it to the thinking Reason, to the essence of mind. [...] It is no escape to turn round and explain that Reason falls into contradictions only by applying the categories. For this application of the categories is maintained to be necessary . . . . (Hegel, Lesser Logic, section 48, 76–77, qtd in Priest 400)


Priest lastly considers Fichte’s influence on Hegel. Fichte criticized Kant’s thing-in-itself and instead was concerned with the ego, whose nature is to think. Yet,

there is nothing to think about except itself; and it is impossible to think something unless there is something else to contrast it with. (So at least thought Fichte.) Hence, the self had to create something different, the non-self, against which it could conceive itself. (This is precisely Reason leading a life of its own.) It therefore produces contradiction. Specifically, the non-self must also be self, since nothing else exists. […] as Fichte puts it […]: self = not-self and not-self = self.
(400)


In Fichte’s account, by the self (thesis) conceiving the not-self (antithesis), they coexist happily and give birth to a new antithesis (synthesis). (400)


Hegel had a two-fold criticism of Fichte:

first, that Fichte had not elevated the transcendental ego into something grander, Geist; and second, that he had misunderstood the nature and significance of the final synthesis (1895, 499).
(401, citing Hegel, Lectures on the History of Philosophy, Vol. III)


Nonetheless, Hegel takes up this dialectic of the self, including “the contradictory nature of the alienated state of the self” (401). Priest concludes: “Hegel’s dialetheism is therefore established” (401).


 

 

 



Citations from:

Priest, Graham. ‘Dialectic and Dialetheiç’. Science & Society, 1989/1990, 53 (4) 388–415.


 



 

 

 

 

 

 

Priest, (4) ‘Dialectic and Dialetheic’, section 4, “Motion: An Illustration”, summary

 

by Corry Shores
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[The following is summary. All boldface, underlying and bracketed commentary are my own, unless otherwise indicated.]




Graham Priest


“Dialectic and Dialetheic”


4 Motion: An Illustration



Brief Summary:

One way we can illustrate how dialetheic logic can apply to dialectics is by accounting for motion in a Hegelian way. An object in motion is at a certain point at a certain instant, but since it is in motion, in that instant it is already leaving that point. Thus it is both true and false that the object is at that point in that instant.




Summary 


Priest has been discussing the dialetheism of Hegel’s and Marx’s dialectics. He will now illustrate with the example of motion. If we think of an object in motion as both being in its spot and already leaving it, then the statement that it is in that spot is both true and false.

 

Suppose a body, b, occupies a certain spot, s, at a certain time. What is the instantaneous difference between its being in motion and its being at rest? A Russell would say “none”: being in motion is not an intrinsic, but a relational state. Hegel would say “consistency.” Let A be the sentence “b is at spot s.” Then if b is at rest, A is true, and true only (T). If b is in motion, then A is true, since b does indeed occupy the spot s; but, equally, since it is in motion, it has already started to leave that spot; hence b is not still there: ~A is true. Thus A is both true and false (T and F).
(396)

But there is a problem with this formulation. [I am not exactly sure of the situation Priest describes in the following. It seems that because we have A and ~A separated by conjunction, we are misrepresenting the fact that the opposing terms in dialectics are somehow more intimately related. This has something to do with extension and intensional contradictions. I am not sure what these are. A classical example in intensional logic is ‘the son of Jocasta is the husband of Jocasta’. The extensional meaning is the set too which the terms refer, in this case, they both refer to a set with one member, Oedipus. For the motion example to be an extension rather than an intensional contradiction, perhaps the matter is that we are speaking of two spots, the object being in those two spots, which taken apart from one another is not a contradiction but together they are. But for some reason, dialecticians would say that there is instead internal intensional contradiction. I am not sure how, but perhaps they are saying that somehow ‘the object is at point b’ is in itself already self-contradictory. Priest replies to this objection first here it seems by saying that this is such a conjunction where both parts of the conjunct need to be together for correct information to be conveyed. So in that way they already exhibit an intimate link. However, since dialecticians do not think that the conjunction can be accidental but rather somehow depend on each other, and in that way are very intimately linked, we will need to have more than just an extensional (external) conjunction. Priest will return to this in section 8, so I will quote it for now.]

Some dialecticians would argue that Hegelian contradictions cannot be of the kind illustrated here. For this contradiction is a merely extensional contradiction: a logical contradiction of the form A&~A, where there is no essential connection between the conjuncts. One can, for example, infer each of A and ~A from this contradiction and assert each independently. By contrast; dialectical contradictions are intensional. There is an internal relation between the conjuncts which is not captured by a mere extensional conjunction. Thus, dialectics | [the following is block quotation]

lays stress on the fact that this two-fold interrelation of opposites is to be conceived, not "eclectically," as ·mere. conjunction or succession, but dialectically, in· the sense that these opposites are so far intertwined that the one cannot exist without the othr. Not only do they not exclude each other, they presuppose and reciprocally condition each other. (Wetter, 1958, 340.) [from bibliography: Wetter, G. A. 1958. Dialectical Materialism. London: Routledge and Kegan Paul.]

In particular, it is not permissible to detach either conjunct from the other and assert it, without falsifying the description. (This criticism is made in Havas, 1981.) To a certain extent this objection is simply answered. Less than the whole (relevant) truth can itself be quite misleading and give a false picture of the situation. Thus, suppose your car runs out of petrol and you ask me where the nearest garage is. If I detach and assert only the first conjunct of “There is a garage around the corner but it is closed” my answer will be highly misleading. There is a conversational implicature, to use the notion of Grice (1975), that relevant information has not been omitted. But in dialectical contexts, the distinction between something’s being true (only) and its being true and false is quite crucial. Thus to assert only A when A&~A is true is equally misleading. As Hegel himself puts it (1969, Vol. I, book 1, section 1, ch. 10, 91) [from bibliography: Hegel, G. W. F. 1969 (1812). The Science of Logic. London: Allen and Unwin.]: [the following is block quoted]

The commonest injustice done to a speculative [i.e., dialectical] content is to make it one-sided, that is, to give prominence only to one of the propositions into which it can be resolved. It cannot then be denied that this proposition is asserted; but the statement is just as false as it is true, for once one of the propositions is taken out of the speculative content, the other must be equally considered and stated.

Nonetheless, as Hegel and most other dialecticians have stressed, dialectical contradictions are no mere “accidental” conjunctions. In some sense the contradictory conjuncts depend on each other, so that the one could not exist without the other. Thus, there should indeed be a more intimate relation between dialectical contradictories than mere extensional (external) conjunction. What this is, we will be in a position to see by section 8.
(396-397)

 

 

 

 



Citations from:

Priest, Graham. ‘Dialectic and Dialetheiç’. Science & Society, 1989/1990, 53 (4) 388–415.


 



 

 

 

 

 

 

7 Feb 2015

Priest, (3) ‘Dialectic and Dialetheic’, section 3, “Dialetheic Logic”, summary

 

by Corry Shores
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[The following is summary. All boldface, underlying and bracketed commentary are my own, unless otherwise indicated.]




Graham Priest


“Dialectic and Dialetheic”


3 Dialetheic Logic



Brief Summary:

Dialetheic logic is just like orthodox logic except that it allows for true contradictions, and when there are true contradictions, we cannot infer from them any other proposition we want.




Summary 


Previously Priest explained that those who argue Hegel’s and Marx’s dialectics do not involve self-contradiction (or that they do and for this reason are flawed) are adhering to the modern Frege/Russell logic, which forbids contradiction. However, this is merely an assumption made in this kind of logic, and other assumptions have been called into question. Now Priest will give an informal overview of what dialetheic logic is. In Frege/Russell logic, a sentence can be assigned only one of two truth values, T (true) and F (false). However, in dialetheic logic, a sentence can also take both values. “(Thus, technically, semantic values are non-empty subsets of {T,F}.)” (393). So if a sentence is true, that does not rule out that it is also false, and vice versa. Priest then explains the “truth table” conditions for computing truth values of more complex sentences. The conditions for negation, conjunction, and disjunction are all orthodox. So ~A is true iff A is false, and ~A is false iff A is true. Everything is as you know it for conjunction (true only if both conjuncts are true), and disjunction. [In the next part, Priest seems to be explaining why when something is both true and false, the conjunction of it with its negation is also true and false, and thus at least true.] “Notice that if A is true and false, so is ~A; and so, moreover, is A&~A. In particular, it is true, as dialetheists claim” (393). [The next definitions seem to establish validity and implication:]

 

Logical truth and logical consequence are also defined in the orthodox fashion:

A is a logical truth just if A is (at least) true under all assignments of values

A is a logical consequence of B just if every assignment of values that makes B (at least) true makes A (at least) true
(393-394)

[Priest’s next point seems to be that dialetheic logic and classical logic give the same set of logical truths. I am not exactly sure how this is so. I can understand that all logical truths in classical logic are also true in dialetheic logic. But there are true formulations, like A&~A which are true in dialetheic and not true in classical. So you will have to read the following to interpret it for yourself.]

It may be interesting to note that A is a logical truth if A is a two-valued tautology. Thus, these semantics give the same set of logical truths as does orthodox logic. Thus, both Av~A and ~(A&~A) are logical truths. The second of these may seem surprising initially. But if a certain contradiction, A&~A, may be true, there is no reason why the “secondary contradiction” (A&~A)&~(A&~A) should not also be true.
(394)

[Priest’s next point seems to be that the principle of explosion does not apply in dialetheic logic. So an inference is valid if there is no situation where all the premisses are true and the conclusion false. If we have A&~A, in classical logic we can derive B, because there is no way to make the premise true. But since it can be true in dialetheic logic, we can say A&~A is true and B is false, and thus we cannot validly infer B from the conjunction. Let me quote from Priest’s Logic: A Short Introduction.

an inference is valid provided that there is no situation which makes all the premisses true, and the conclusion untrue (false). That is, it is valid if there is no way of assigning Ts and Fs to the relevant sentences, which results in all the premisses having the value T and the conclusion having the value F.
(Priest, Logic: A Short Introduction, p.13)

 

image

It certainly doesn't seem valid. The wealth of the Queen – great or not – would seem to have no bearing on the aviatory abilities of pigs.
(Priest, Logic: A Short Introduction, p.8)

What about the inference with which we started: q, ¬q/p? Proceeding as before, we get:

image

Again, the inference is valid; and now we see why. There is no row in which both of the premisses are true and the conclusion is false. Indeed , there is no row in which both of the premisses are true. The conclusion doesn’t really matter at all! Sometimes, logicians describe this situation by saying that the inference is vacuously valid, just because the premisses could never be true together.
(Priest, Logic: A Short Introduction, p.14)

{Later, Priest discusses the ‘new assumptions’ that a formulation can be both true and false.}


it is worth returning to the inference with which we started in Chapter 2: q, ¬q/p. As we saw in that chapter, given the assumptions made there, this inference is valid. But given the new assumptions, things are different. To see why, just take a situation where q has the values T and F, but p has just the value F. Since q is both T and F, ¬q is also both | T and F. Hence, both premisses are T (and F as well, but that is not relevant), and the conclusion, p, is not T. This gives us another diagnosis of why we find the inference intuitively invalid. It is invalid.
(Priest, Logic: A Short Introduction, p.35)

I continue by quoting from the Dialectic paper. The ‘as might be expected’ in the following perhaps refers to our intuition that any sentence whatsoever does not validly result from a contradiction.]

The semantics do, however, give a notion of logical consequence different from the orthodox one. In particular, and as might be expected, B is not a consequence of A&~A, as may be seen by simply assigning B the value F, while assigning A both T and F.
(394)


Priest shows how we can “extend these propositional semantics to a semantics for full first-order logic” in another text [Chapter 5 of In Contradiction]. Priest also says that we can say that identity statements taking the form a = b can be both true and false, if enough care is taken “concerning how, exactly, truth values are assigned” [he does not go into those details here] (394). However, if that care is taken, then “all the principles of identity, such as the law of identity (a = a) and the substitutivity of identicals, are assured. As usual, I will write a ≠ b for ~a = b.” (394)


Priest will need another operator which will turn sentences into objects. In English we can use ‘that’ to turn ‘John is happy’ into ‘That John is happy…’ or we can use a gerund, ‘John’s being happy.’ Priest will use the ^ symbol to mean “that”, such that

if A is any sentence, ^A is a noun phrase, and therefore denotes an object. […] it is fairly clear that in some sense ^A and ^~A are opposites. (Think of John’s being happy and his not being happy […].) Since an object is not the same as its opposite, it is natural to require that ^A ≠ ^~A.
(395)


As we can see, all this is orthodox logic, except for the condition that some formulations can be assigned both T and F. Hence “orthodox logic is just a special case of these semantics which ignores a dialectically important case” and “Thus we may stretch Hegel's claim a little as follows:(Frege/Russell) formal logic is perfectly valid in its domain, but dialectical (dialetheic) logic is more general” (395).


Classical logic’s domain is ‘the consistent’, which is what? “dialecticians have had a standard line here: the static is consistent; only when change enters the picture do contradictions arise” (395). Thus we can argue if want that dialects is based on dialetheism. (395)


But “Dialetheic logic is certainly not dialectics”, yet we can at least say that dialetheic logic is a rigorous non-trivial formal logic, and dialectics is compatible with it. [Priest writes: “Dialetheic logic is certainly not dialectics; but it is quite sufficient to show that dialetheism is compatible with the rigor of a non-trivial formal logic” (396).] Priest will move onto dialectics, now that we have established that it can be logically valid to have contradictions in one’s systems.

 

 

 



Citations from:

Priest, Graham. ‘Dialectic and Dialetheiç’. Science & Society, 1989/1990, 53 (4) 388–415.

Or if otherwise noted, from:

Priest, Graham. Logic: A Very Short Introduction. Oxford / New York: Oxford, 2000.