Online research in philosophy

In his 'Meaning and Truth-Conditions', Gary Kemp offers a reconstruction of Frege's infamous 'regress argument' which purports to rely only upon the premises that the meaning of a sentence is its truth-condition and that each sentence expresses a unique proposition. If cogent, the argument would show that only someone who accepts a form of semantic holism can use the notion of truth to explain that of meaning. I respond that Kemp relies heavily upon what he himself styles 'a literal, rather wooden' understanding of truth-conditions. I explore alternatives, and say a few words about how Frege's regress argument might best be understood.

This book expounds and defends a new conception of the relation between truth and meaning. Atlas argues that the sense of a sense-general sentence radically underdetermines (independently of indexicality) its truth-conditional content. He applies this linguistic analysis to illuminate old and new philosophical problems of meaning, truth, falsity, negation, existence, presupposition, and implicature. In particular, he demonstrates how the concept of ambiguity has been misused and confused with other concepts of meaning, and how the interface between semantics and pragmatics has been misunderstood. The problems he tackles are common to philosophy, linguistics, cognitive psychology, and artificial intelligence, and his conclusions will be of interest to all those working in these fields.

A conditional takes the form ‘If A, then C’. On the truth-conditional view of conditionals, conditional statements state things with truth-conditions. On the suppositional view, conditional statements involve the expression of a supposition. I develop and defend a view on which conditional statements both state things with truth-conditions and express suppositions. On this view, something is fundamentally right about standard truth-conditional and standard suppositional views. Considerations in favor of conditional contents lead us to attribute truth-conditional contents to conditional statements; considerations in favor of the suppositional view then lead us to an unexpected account of these contents. The resulting view has a number of benefits, including a unified treatment of conditional speech acts, a plausible account of our practice of ascribing truth-values to conditional statements, a simple explanation of the apparent equivalence between probabilities of conditionals and conditional probabilities, an intuitive treatment of ‘Gibbardian stand-offs’, a plausible logic of conditionals, and an explanation of why theorizing about conditionals has proved so difficult.

I argue that conventional implicatures embed in logical compounds, and are non-truth-conditional contributors to sentence meaning. This, I argue has significant implications for how we understand truth, truth-conditional content, and truth-bearers.

The truth-conditional theory of sense holds that a theory of truth for a natural language can serve as a theory of sense: if knowledge of a theory of truth for a language L is sufficient for understanding utterance of L-sentences, the T-sentences of the theory 'show' the sense of the uttered object-language sentences. In this paper I aim to show that indexicals create a serious problem for this prima facie attractive theoretical option. The so-called 'instantiation problem' is that a truth-theory for indexical languages needs to contain universal statements that show how the reference of indexicals depends on features of the utterance context. Now one can deduce from such statements T-sentences that do not show the sense of an indexical sentence on an occasion of use. I survey proposed solutions to the instantiation problem by Evans and Sainsbury and, unfortunately, find them all wanting. Perhaps there is nothing like the sense-giving truth-condition for an indexical sentence.

But the sort of context sensitivity exhibited in such sentences does not compromise the claim that meaning determines truth conditions, since recourse to context here is directed and restricted by conventional meaning alone. Anyone who understands sentence (2) knows that its utterances are true just in case whatever object is demonstrated in the context of utterance is nice; and he also knows that any utterance of (2) says of, or expresses about, whichever object is demonstrated that it’s nice. (Similarly, anyone who understands (3) knows that any utterance of it is true just in case whoever utters it has eaten. And every utterance says of, or expresses about, the speaker that he or she has eaten.) In sum, according to the thesis that meaning determines truth conditions, (indicative) sentences divide into two classes – those with truth conditions tout..

Are all instances of the T-schema assertable? I argue that they are not. The reason is the presence of conventional implicature in a language. Conventional implicature is meant to be a component of the rule-based content that a sentence can have, but it makes no contribution to the sentence's truth-conditions. One might think that a conventional implicature is like a force operator. But it is not, since it can enter into the scope of logical operators. It follows that the semantic content of a sentence is not given simply by its truth-conditional content. So not all instances of the T-schema are assertable in the relevant sense. Consequently, there is a strong case to be made against truth-conditional semantics of the disquotational variety and deflationism about truth.

Controversy has arisen of late over the claim that deflationism about truth requires that we explain meaning in terms of something other than truth-conditions. This controversy, it is argued, is due to unclarity as to whether the basic deflationary claim that a sentence and a sentence that attributes truth to it are equivalent in meaning is intended to involve the truth-predicate of the object language for which we develop an account of meaning, or is intended to involve the truth-predicate of the metalanguage in which we develop an account of meaning. The former view is compatible with the truth-conditional theory of meaning for the object language, the latter is incompatible with it. However, the former view is also trivially true; hence we should endorse the claim that any form of deflationism worth being interested in is incompatible with understanding meaning truth-conditionally.

From the perspective of certain contextualists, the most worrisome theses of Cappelen & Lepore’s Insensitive Semantics would seem to be: T1: The only context sensitive items are the basic and obvious ones, i.e., pronouns, demonstratives, etc.; T2: Once referents are assigned to these basic and obvious items in a (declarative) sentence, that sentence has truth conditions; T3: This truth-conditional content is asserted when the sentence is used; T4: The content of the assertion made is not thereby fixed, however, because speech act content depends upon features beyond the utterance context; T5: The relativized truth conditions are psychologically relevant.

The Gricean distinction between saying and implicating suggests a clear division of labour between semantics and pragmatics. The standard view that a semantic theory delivers truth-conditions for every well-formed sentence of a language has been grafted onto a Gricean view of the semantics-pragmatics divide. Consequently, many believe that truth-conditions can be specified in a way that is essentially free from pragmatic considerations. This view has been challenged, by those who argue for pragmatic intrusion into truth-conditional content. Others have argued in favour of preserving a pragmatically untainted conception of semantics, but for a more finegrained conception of pragmatics. This debate has led to different proposals as to how to draw the boundary between semantics and pragmatics. This philosophical debate has been conducted largely independently of the debate in linguistics about the interfaces between the various sub-systems of the language faculty in the mind/brain.