Online research in philosophy

Davidson approaches the notions of meaning and interpretation with the aim of characterizing semantic competence in the syntactically characterized natural language. The objective is to provide a truth-theory for a language, generating T-sentences expressed in the semantic metalanguage, so that each sentence of the object language receives an appropriate interpretation. Proceeding within the constraints of referential semantics, I will argue for the viability of reconstructing the notion of linguistic meaning within the Tarskian theory of reference. However, the view proposed here involves a revision of Davidson’s con-ception of the object of semantic investigation. Taking (idealized) language-theories as the proper object of semantic characterization, provides solutions to outstanding problems in Davidson’s views, better approximates the practice in standard model-theoretic semantics, and incorporates the elements of semantic competence sought for in tradi¬tional theories of lexical analysis. Sources of evidence beyond those emphasized by Davidson will be invoked in order to allow for the selection of interpre¬tive T-sentences. In the final section, possible Quinean objections will be considered.

In the dissertation we study the complexity of generalized quantifiers in natural language. Our perspective is interdisciplinary: we combine philosophical insights with theoretical computer science, experimental cognitive science and linguistic theories.

In Chapter 1 we argue for identifying a part of meaning, the so-called referential meaning (model-checking), with algorithms. Moreover, we discuss the influence of computational complexity theory on cognitive tasks. We give some arguments to treat as cognitively tractable only those problems which can be computed in polynomial time. Additionally, we suggest that plausible semantic theories of the everyday fragment of natural language can be formulated in the existential fragment of second-order logic.

In Chapter 2 we give an overview of the basic notions of generalized quantifier theory, computability theory, and descriptive complexity theory.

In Chapter 3 we prove that PTIME quantifiers are closed under iteration, cumulation and resumption. Next, we discuss the NP-completeness of branching quantifiers. Finally, we show that some Ramsey quantifiers define NP-complete classes of finite models while others stay in PTIME. We also give a sufficient condition for a Ramsey quantifier to be computable in polynomial time.

In Chapter 4 we investigate the computational complexity of polyadic lifts expressing various readings of reciprocal sentences with quantified antecedents. We show a dichotomy between these readings: the strong reciprocal reading can create NP-complete constructions, while the weak and the intermediate reciprocal readings do not. Additionally, we argue that this difference should be acknowledged in the Strong Meaning hypothesis.

In Chapter 5 we study the definability and complexity of the type-shifting approach to collective quantification in natural language. We show that under reasonable complexity assumptions it is not general enough to cover the semantics of all collective quantifiers in natural language. The type-shifting approach cannot lead outside second-order logic and arguably some collective quantifiers are not expressible in second-order logic. As a result, we argue that algebraic (many-sorted) formalisms dealing with collectivity are more plausible than the type-shifting approach. Moreover, we suggest that some collective quantifiers might not be realized in everyday language due to their high computational complexity. Additionally, we introduce the so-called second-order generalized quantifiers to the study of collective semantics.

In Chapter 6 we study the statement known as Hintikka's thesis: that the semantics of sentences like ``Most boys and most girls hate each other'' is not expressible by linear formulae and one needs to use branching quantification. We discuss possible readings of such sentences and come to the conclusion that they are expressible by linear formulae, as opposed to what Hintikka states. Next, we propose empirical evidence confirming our th

One’s account of the meaning of ethical sentences should fit – roughly, as part to whole – with one’s account of the meaning of sentences in general. When we ask, though, where one widely discussed account of the meaning of ethical sentences fits with more general accounts of meaning, the answer is frustratingly unclear. The account I have in mind is the sort of metaethical expressivism inspired by Ayer, Stevenson, and Hare, and defended and worked out in more detail recently by Blackburn, Gibbard, and others. So, my first aim (§1) in this paper is to pose this question about expressivism’s commitments in the theory of meaning and to characterize the answer I think is most natural, given the place expressivist accounts attempt to occupy metaethics. This involves appeal to an ideationalist account of meaning. Unfortunately for the expressivist, however, this answer generates a problem; it’s my second aim (§2) to articulate this problem. Then, my third aim (§3) is to argue that this problem doesn’t extend to the sort of account of the meaning of ethical claims that I favor, which is like expressivism in rejecting a representationalist order of semantic explanation but unlike expressivism in basing an alternative order of semantic explanation on inferential role rather than expressive function.

This dissertation investigates the plausibility of metaethical relativism, or more specifically, what I call “moral truth-value relativism”: the idea that the truth of a moral statement or belief depends on who utters or has it, or who assesses it. According to the most prevalent variants of this view in philosophical literature – “standard relativism” – the truth-values are relative to people’s moralities, often understood as some subset of their affective or desirelike attitudes. Standard relativism has two main contenders: absolutism – the view that the truth-values of moral statements and beliefs do not vary in that way – and non-cognitivism – the view that moral judgements do not have truth-values, since they express affective or desire-like attitudes rather than beliefs. Almost the entire dissertation concerns the plausibility of standard relativism in contrast to absolutism. Part 1 examines first the two main arguments for standard relativism: that it accounts for the connection between moral judgements and motivation (chapter 2), and for the prevalence of diversity of moral opinion (chapter 3). Then the most common objection is considered: that it is inconsistent with the existence of genuine moral disagreements (chapter 4). I argue that these arguments are inconclusive. Both relativism and absolutism can account for the features discussed. Part 2 focuses on the fact that different people have different strongly held intuitions about the relative or absolute nature of morality. I argue that given a common methodological approach in philosophy and metaethics, which takes such intuitions as evidence of correct analyses, this difference in intuitions suggests that neither a relativist nor absolutist analysis can be correct for everyone’s moral judgements. I argue that this result holds both given semantic internalism (chapter 6) and given semantic externalism (chapter 7). To get one single analysis of everyone’s moral judgements we would have to abandon the intuitionbased methodology. In chapter 8, however, I argue that we can maintain this methodology if we accept analysis pluralism, the view that different analyses hold for different people’s moral judgements.

In his book Wittgenstein on Rules and Private Language (Kripke 1982), Saul Kripke develops a famous argument that purports to show that there are no facts about what we mean by the expressions of our language: ascriptions of meaning, such as “Jones means addition by ‘+’” or “Smith means green by ‘green’”, are according to Kripke’s Wittgenstein neither true nor false. Kripke’s Wittgenstein thus argues for a form of non- factualism about ascriptions of meaning: ascriptions of meaning do not purport to state facts.1 Define semantic realism to be the view that ascriptions of meaning are apt to be assessed in terms of truth and falsity, and are, at least in some instances, true. Semantic realism, thus defined, is a form of cognitivism about semantic judgement, according to which judgements ascribing meaning express beliefs, states apt for assessment in terms of truth and falsity. Kripke’s Wittgenstein thus argues against semantic realism, and in favour of a form of semantic non-cognitivism. However, another form of opposition to semantic realism accepts that semantic judgements express beliefs but asserts that those beliefs are systematically and uniformly false.2 This cognitivist form of opposition to semantic realism is similar to the error-theoretic form of opposition to moral realism mooted by J.L. Mackie in the first chapter of his Ethics: Inventing Right and Wrong (Mackie 1977). In this paper I will investigate whether there is a plausible analogue of Mackie’s “argument from queerness” that can be used to make a case for an error-theory of semantic judgement. In §2 I set out what I take to be Mackie’s argument from queerness against moral realism. In §3 I argue that there is no straightforward and plausible analogue of that argument that would justify an error theory about ascriptions of meaning. In §4 and §5 I defend the argument of §3 against an objection developed in a recent paper by Daniel Whiting.

One of the core questions in contemporary metaethics concerns the nature and status of moral claims. However, this question presupposes that morality is unified, and that a single metaethical account will suffice. This thesis aims to challenge that presupposition. In particular, I argue that there is a substantial theoretical payoff to be had from combining two distinct metaethical theories – realism, on the one hand, and constructivism, on the other – whilst limiting the scope of each. In the realist case, the discourse aims to describe a particular feature of reality; in the constructivist case, the discourse aims to solve some of the coordination problems faced by people as social beings. We have, therefore, two distinct sources of moral reasons. The resulting ‘hybrid’ theory is appealing at the metaethical level, but also yields an attractive picture at the applied level. Specifically, it retains the core intuition underlying utilitarianism, whilst incorporating a broadly contractarian account of morality. On this account, our reasons for not harming other persons are at least the same as our reasons for not harming animals – but we have additional reasons to refrain from harming persons. Chapter One establishes a moderate presumption in favour of moral realism, understood as the claim that moral discourse aims to represent the world, deals in objective truths, and yields statements capable of truth or falsity. Chapter Two addresses arguments for moral antirealism: these arguments can be met by restricting the scope of moral realism. Chapter Three explores the content of the resultant moral realism: specifically, realism about the intrinsic value of hedonic states. Chapter Four deals with that part of morality which is unaccounted for by restricted moral realism, and offers an outline form of contractarian constructivism. Chapter Five investigates the consequences of the hybrid metaethical theory for applied ethics.

The focus of this thesis is a defense of metaphorical meaning. Since metaphor is such a fundamental aspect of language, my first emphasis is to find error in pragmatic theories of meaning. The first two chapters are where this occurs; in chapter one, we first investigate an account of intention and convention as developed by Grice, Lewis, and others, ultimately leading to our rejection of it. The second chapter is similar in structure, but rather investigates Searle’s account of regulative rules. The third chapter refutes those positions that reject the possibility of metaphorical meaning, i.e., that consider it a ‘pragmatic’ phenomenon (one that is determined by use rather than meaning). Tbat chapter also investigates the issue of language as context-independent, the possibility of a metaphor as paraphrasable, and the question of ‘dead metaphor.’ The fourth chapter, consequently, aims at presenting a positive account of metaphorical meaning. My claim is that not only does metaphor have meaning, but that all meaning is to some extent metaphorical. We will also determine why we use metaphor and what, in my view, a dead metaphor really is. The final chapter is designed to give a preliminary account of what a theory of understanding compatible with metaphor would look like and explores views outside of analytic philosophy.

Semantics is the investigation of meaning, and semantic theories, including semantic theories about moral language, come in two very different kinds. Descriptive semantic theories are theories about what words mean. So descriptive moral semantic theories are theories about what moral words mean: words like ‘good’, ‘better’, ‘right’, ‘must’, ‘ought’, ‘reason’, and ‘rational’. In contrast, foundational semantic theories are theories about why words mean what they do, or more specifically, about what makes it the case that words mean what they do. So foundational moral semantic theories are theories about what makes it the case that moral words mean what they do: words like ‘good’, ‘better’, and so on. Since both kinds of theory are sometimes referred to as varieties of ‘moral semantics’, this article will cover both. Just as semantic theories themselves come in two kinds, descriptive semantics raises two very different kinds of issues. Some issues in descriptive semantics turn on the question of what kind of theory is required, in order to be able to account for the meanings of words – including of moral words, in particular. Such questions are questions about the nature of semantic theorizing. So, for example, according to truth-conditional theories, an adequate descriptive semantic theory needs to provide a recursive and compositional characterization of values for sentences which determine the truth conditions of each sentence. Whereas according to expressivist theories, an adequate descriptive semantic theory does not need to determine truth conditions at all, but does need to recursively and compositionally associate each sentence ‘P’ with a mental state – intuitively, with the state which constitutes what it is to think that P. Truth-conditional and expressivist theories involve very different conceptions of the nature of linguistic meaning, but their contrast is one of the most important issues in moral semantics, and they are not even the only live competitors. In contrast, other issues in descriptive semantics, rather than turning on what kind of theory is required, raise questions about specific properties of the meanings of particular words..

This chapter covers some of Robert Brandom’s contributions to our understanding of communication. Topics discussed include his theory of discursive practice, his inferential semantics, his scorekeeping pragmatics, his views on the “transmission” model of communication, and his semantic perspectivism. I compare his scorekeeping pragmatic theory to other kinds of pragmatic theories, and I argue that his semantic perspectivism can be understood as a global indexical relativism.

Mark Timmons and Terry Horgan have argued that the new moral realism, which rests on the causal theory of reference, is untenable. While I do agree that the new moral realism is untenable, I do not think that Timmons and Horgan have succeeded in showing that it is. I will lay out the case for new moral realism and Horgan and Timmons’ argument against it, and then argue that their argument fails. Further, I will discuss Boyd’s semantic theory as well as attempts to improve upon it, raise serious problems for these semantic accounts, and suggest an alternative view that accounts for our use of moral terms.