Identity Theory of Truth

In this article, we will present a number of technical results concerning Classical Logic, ST and related systems. Our main contribution consists in offering a novel identity criterion for logics in general and, therefore, for Classical Logic. In particular, we will firstly generalize the ST phenomenon, thereby obtaining a recursively defined hierarchy of strict-tolerant systems. Secondly, we will prove that the logics in this hierarchy are progressively more classical, although not entirely classical. We will claim that a logic is to (...) be identified with an infinite sequence of consequence relations holding between increasingly complex relata: formulae, inferences, metainferences, and so on. As a result, the present proposal allows not only to differentiate Classical Logic from ST, but also from other systems sharing with it their valid metainferences. Finally, we show how these results have interesting consequences for some topics in the philosophical logic literature, among them for the debate around Logical Pluralism. The reason being that the discussion concerning this topic is usually carried out employing a rivalry criterion for logics that will need to be modified in light of the present investigation, according to which two logics can be non-identical even if they share the same valid inferences. (shrink)

I challenge the assumption that the pragmatist-, coherence-, identity- and deflationary theories of truth are essentially incompatible and rival views to the correspondence theory, without endorsing pluralism. With the exception of some versions of the identity theory, the alternative theories only appear to genuinely contradict the correspondence theory, either when they are wedded to a rejection of an objective reality, or when it is assumed that a ‘theory of truth’ is a theory of the function of the truth-predicate. I argue (...) that the correspondence theory should not be understood as a theory about the function of the truth-predicate, and that the core ideas of the alternative views, once separated from any anti-realist convictions, are best understood as complementary views about different aspects of a fairly complex phenomenon, notably of how our beliefs relate to their subject matter and how we reason and talk about that relation. (shrink)

In 'On the nature of truth and falsehood' Russell offers both a multiple relation theory of judgment and a correspondence theory of truth. It has been a prevailing understanding of the Tractatus that Wittgenstein rejects Russell’s multiple relation idea but endorses the correspondence theory. Ramsey took the opposite view. In his 'Facts and Propositions', Ramsey endorses Russell’s multiple relation idea, rejects the correspondence theory, and then asserts that these moves are both due to Wittgenstein. This chapter will argue that Ramsey’s (...) ascriptions are both correct. The extent of the agreement between Ramsey and Wittgenstein will be argued, moreover, to count definitively against standard understandings of Ramsey as a redundancy theorist of truth. Wittgenstein is no correspondence theorist and Ramsey is no redundancy theorist; rather, both philosophers offer identity theories of truth. (shrink)

This takes a closer look at the actual semantic behavior of apparent truth predicates in English and re-evaluates the way they could motivate particular philosophical views regarding the formal status of 'truth predicates' and their semantics. The paper distinguishes two types of 'truth predicates' and proposes semantic analyses that better reflect the linguistic facts. These analyses match particular independently motivated philosophical views.

John McDowell’s position on the metaphysics of thought combines an identity conception of truth, the view that if one thinks truly that p, then what one thinks is the fact that p, with a Tractarian conception of the world as the totality of facts. In response to the charge that it is incoherent, William Fish and Cynthia Macdonald have recently defended a novel way of developing McDowell’s position. I argue that their interesting proposal doesn't work, owing to the fact that (...) it can accommodate neither false thought nor, it seems, certain cases of true thought. (shrink)

What is truth? Is there anything that all truths have in common that makes them true rather than false? Is truth independent of human thought, or does it depend in some way on what we believe or what we would be justified in believing? In what sense, if any, is it better for beliefs or statements to be true than to be false? In this engaging and accessible new introduction Chase Wrenn surveys a variety of theories of the nature of (...) truth and evaluates their philosophical costs and benefits. Paying particular attention to how the theories accommodate realist intuitions and make sense of truth’s value, he discusses a full range of theories from classical correspondence to relatively new deflationary and pluralist accounts. The book provides a clear, non-technical entry point to contemporary debates about truth for non-specialists. Specialists will also find new contributions to those debates, including a new argument for the superiority of deflationism to causal correspondence and pluralist theories. Drawing on a range of traditional and contemporary debates, this book will be of interest to students and scholars alike and anyone interested in the nature and value of truth. (shrink)

The identity theory of truth takes on different forms depending on whether it is combined with a dual relation or a multiple relation theory of judgment. This paper argues that there are two significant problems for the dual relation identity theorist regarding thought’s answerability to reality, neither of which takes a grip on the multiple relation identity theory.

Jennifer Hornsby’s 1997 paper, ‘Truth: The Identity Theory’, has been highly influential in making the identity theory of truth a viable option in contemporary philosophy. In this introduction and commentary I focus on what distinguishes her theory and its methodology from the correspondence theory and the ‘substantivist’ methodology, and on other issues that have not been widely discussed in earlier commentaries yet are central to the current debate on truth.

In ‘On McDowell's identity conception of truth’ , we suggested that McDowell's Identity Theory, according to which a proposition is true if and only if it is identical with a fact, is only fully understood when we realize that there are two identity claims involved. The first is that, when one thinks truly, the content of a whole thought is identical with a Tractarian Tatsachen – a complex fact constituted by simple Sachverhalte – and the second is that these simple (...) Sachverhalte are in turn identical with simple Fregean senses. 1As an example, we suggested that the complex content/proposition/Fregean sense is identical with the Tractarian Tatsachen constituted by the two Sachverhalte: the object's being a tiger and the object's being undernourished, both of which can be seen, as the second identity with simple Fregean senses requires, to present an object in a certain way – as being, in turn, a tiger and undernourished.In his response to our article, Julian Dodd raises three internal criticisms concerning the coherence of the view as a whole, as well as the interpretative criticism that, regardless of the internal coherence of the view, it is not McDowell's. We think that Dodd fails to appreciate the view we have developed in our article, so much so that he believes that his own proffered view of McDowell, articulated in the final section of his response, is an alternative to our own position when in fact it is simply a restatement of that position. Because this point is so fundamental, we begin below by spelling out exactly where Dodd's understanding of our view goes wrong and so why his interpretative criticism misses its target before addressing the internal criticisms concerning the coherence of the view as a …. (shrink)

is true, there is a truth-maker (e.g., a fact) with which it is identical and the truth of the former consists in its identity with the latter. The theory is best understood as a reaction to the correspondence theory, according to which the relation of truth-bearer to truth-maker is correspondence. A correspondence theory is vulnerable to the nagging suspicion that if the best we can do is make statements that merely correspond to the truth, then we inevitably fail to capture (...) the reality they are about and thus fall short of the truth we aim at. An identity theory is designed to overcome this suspicion. (shrink)

John McDowell espouses a certain conception of the thinking subject: as an embodied, living, finite being, with a capacity for experience that can take in the world, and stand in relations of warrant to subjects' beliefs. McDowell presents this conception of the subject as requiring a related conception of the world: as not located outside the conceptual sphere. In this latter conception, idealism and common-sense realism are supposed to coincide. But I suggest that McDowell's conception of the subject scuppers this (...) intended coincidence. The upshot is a dilemma: McDowell can retain his conception of the subject, but lose the coincidence; or he can keep the coincidence, but abandon his conception of the subject. (shrink)

(2005). The unimportance of being modest: a footnote to McDowell’s note. International Journal of Philosophical Studies: Vol. 13, No. 1, pp. 89-93. doi: 10.1080/0967255042000324362.

The paper is concerned with the idea that the world is the totality of facts, not of things – with what is involved in thinking of the world in that way, and why one might do so. It approaches this issue through a comparison between Wittgenstein’s Tractatus and the identity theory of truth proposed by Hornsby and McDowell.The paper’s positive conclusion is that there is a genuine affinity between these two. A negative contention is that the modern identity theory is (...) vulnerable to a complaint of idealism that the Tractatus can deflect. (shrink)

Book Information An Identity Theory of Truth. By Dodd Julian. Macmillan. Basingstoke. 2000. Pp. ix + 199. Hardback, £42.50.

The identity theory of truth, according to which true thoughts are identical with facts, is very hard to formulate. It oscillates between substantive versions, which are implausible, and a merely truistic version, which is difficult to distinguish from deflationism about truth. This tension is present in the form of identity theory that one can attribute to McDowell from his views on perception, and in the conception defended by Hornsby under that name.

According to the so-called identity theory of truth. A proposition is true if the given proposition is identical to some fact. But with which fact must a proposition be identical if it is to be true? This question, according to some philosophers (notably Stewart Candlish), raises serious problems for the identity theory of truth. The worry is that the identity must specify the "right fact" if it is to be an acceptable theory. The current paper aims to help the identity (...) theory by dissolving the alleged problem of specifying the "right fact".-correspondence to: bealluconn.edu. (shrink)

This book argues that correspondence theories of truth fail because the relation that holds between a true thought and a fact is that of identity, not correspondence. Facts are not complexes of worldly entities which make thoughts true they are merely true thoughts. According to Julian Dodd, the resulting modest identity theory, while not defining truth, correctly diagnoses the failure of correspondence theories, and thereby prepares the ground for a defensible deflation of the concept of truth.

Most recent discussions of truth ignore the fact that a few philosophers, past and present, have flirted with and sometimes openly subscribed to an identity theory, according to which a proposition's being true consists in its identity with the reality it is supposedly about. This neglect is probably due to the theory's counter-intuitiveness: it faces obvious and fundamental objections. The aim of this paper is to consider these objections and decide if there is a version of the theory which can (...) escape them, thereby becoming an at least initially plausible candidate for an account of truth. In this way the metaphysical price exacted by commitment to an identity theory can be assessed. (shrink)

This is a response to Jennifer Hornsby's Presidential Address to the Aristotelian Society in 1996 (published 1997) and to Julian Dodd's defences of an identity theory. Both authors explain their versions of the theory through its rejection of a correspondence theory and its insistence on the indefinability of truth. I ask what more there is to the identity theory to justify its title and argue that the investigation of this matter reveals difficulties which neither author resolves.

I want to promote what I shall call ‘the identity theory of truth’. I suggest that other accounts put forward as theories of truth are genuine rivals to it, but are unacceptable. A certain conception of thinkables belongs with the identity theory’s conception of truth. I introduce these conceptions in Part I, by reference to John McDowell’s Mind and World; and I show why they have a place in an identity theory, which I introduce by reference to Frege. In Part (...) II, I elaborate on the conception of thinkables, with a view to demonstrating that the identity theory’s conception of truth is defensible. Part III is concerned with the theory’s relation to some recent work on the concept of truth: I hope to show that the identity theorist not only has a defensible conception of truth, but also, in the present state of play, has appropriate ambitions. (shrink)

Book synopsis: "What is truth?" has long been the philosophical question par excellence. The Nature of Truth collects in one volume the twentieth century's most influential philosophical work on the subject. The coverage strikes a balance between classic works and the leading edge of current philosophical research. The essays center around two questions: Does truth have an underlying nature? And if so, what sort of nature does it have? Thus the book discusses both traditional and deflationary theories of truth, as (...) well as phenomenological, postmodern, and pluralist approaches to the problem. The essays are organized by theory. Each of the seven sections opens with a detailed introduction that not only discusses the essays in that section but relates them to other relevant essays in the book. Eleven of the essays are previously unpublished or substantially revised. (shrink)

1. The conclusion of Stewart Candlish’s pithy survey of identity theories of truth is that he is not yet convinced that any instance is more than an “historical curiosity”. Candlish in effect presents the would-be identity theorist with a dilemma: identity theories are either substantial, yet intrinsically implausible ); or else they are trivial.

Recently we have seen the disinterring, inspection, attribution to various philosophers including Bradley, and eventually recommendation of a forgotten theory of truth, the identity theory. But have we yet been given compelling reason to regard this theory, in any of its so far recognized variants, as anything other than a mere historical curiosity? In this paper I shall query some of the attributions, and try to answer this question.

The main thesis of this paper is that John McDowell (in his Mind and World) tries to occupy a position that is not coherently statable; namely, that facts have objects and properties as constituents and are yet identical with true (Fregean) Thoughts. This position is contrasted with two other identity theories of truth: the robust theory, in which true propositions are identified with facts (which are understood to have objects and properties as constituents); and the modest theory, in which facts (...) are identified with true Fregean Thoughts. I argue that the modest theory is to be preferred. (shrink)

The aim of this paper is to criticize Thomas Baldwin's claim, that in developing an identity theory of truth, F H Bradley was following Hegel. It is argued that Baldwin has incorrectly understood certain passages from Hegel which he cites in defense of this view, and that Hegel's conception of truth was primarily material, not propositional.