Alex Silk

This paper argues that a standard analysis of modals from formal semantics suggests a solution to the detaching problem — the problem of whether un-embedded 'ought'-claims can "detach" (be derived) from hypothetical imperatives and their antecedent conditions. On a broadly Kratzerian analysis, modals have a skeletal conventional meaning and receive a particular reading (e.g., deontic, epistemic, teleological) only relative to certain forms of contextual supplementation. I argue that 'ought'-claims can detach — subject to an important qualification — but only as long as the 'ought's in the conditional premise and conclusion are interpreted relative to the same ordering sources. Although modus ponens can be shown to fail with hypothetical imperatives, the cases in question do not constitute a failure of detachment in the sense that ethicists have cared about. Rival wide-scoping accounts are proven to be linguistically problematic. They make incorrect predictions about the meanings of hypothetical imperatives, and founder in response to quantificational variants of the detaching problem

Contextualists and relativists about predicates of personal taste, epistemic modals, and so on (“CR-expressions”) agree that the interpretation of these expressions depends, in some sense, on context. Relativists claim that the sort of context-sensitivity exhibited by CR-expressions is importantly different from that exhibited by paradigm context-sensitive expressions. This bifurcation is often motivated by the claim that the two classes of expressions behave differently in patterns of agreement and disagreement. I provide cases illustrating that the same sorts of discourse phenomena that have been thought problematic for contextualists can arise with paradigm context-sensitive expressions. These cases motivate a more unified treatment of paradigm context-sensitive expressions and the expressions that have figured in recent contextualism/relativism debates

Expressivism promises an illuminating account of the nature of normative judgment. But worries about the details of expressivist semantics have led many to doubt whether expressivism's putative advantages can be secured. Drawing on insights from linguistic semantics and decision theory, I develop a novel framework for implementing an expressivist semantics that I call ordering expressivism. I argue that by systematically interpreting the orderings that figure in analyses of normative terms in terms of the basic practical attitude of conditional weak preference, the expressivist can explain the semantic properties of normative sentences in terms of the logical properties of that attitude. Expressivism's problems with capturing the logical relations among normative sentences can be reduced to the familiar, more tractable problem of explaining certain coherence constraints on preferences. Particular attention is given to the interpretation of wide-scope negation. The proposed solution is also extended to other types of embedded contexts—most notably, disjunctions

This book investigates context-sensitivity in natural language by examining the meaning and use of a target class of theoretically recalcitrant expressions. These expressions – including epistemic vocabulary, normative and evaluative vocabulary, and vague language – exhibit systematic differences from paradigm context-sensitive expressions in their discourse dynamics and embedding properties. Many researchers have responded by rethinking the nature of linguistic meaning and communication. Drawing on general insights about the role of context in interpretation and collaborative action, I develop an improved contextualist theory of CR-expressions within the classical truth-conditional paradigm: Discourse Contextualism. The aim of Discourse Contextualism is to derive the distinctive linguistic behavior of a CR-expression from a particular contextualist interpretation of an independently motivated formal semantics, along with general principles of interpretation and conversation. It is shown how in using CR-expressions, speakers can exploit their mutual grammatical and world knowledge, and general pragmatic reasoning skills, to coordinate their attitudes and negotiate about how the context should evolve. The book focuses primarily on developing a Discourse Contextualist semantics and pragmatics for epistemic modals. The framework is also applied to other categories of epistemic vocabulary, normative and evaluative vocabulary, and vague adjectives. Similarities/differences among these expressions, and among context-sensitive expressions more generally, have been underexplored. Accounts are developed of (e.g.) the role of presupposition in collaborative action and discourse; the interpretation of context-sensitive expressions in embedded contexts; interactions among logic, semantics, pragmatics, metasemantics, and substantive normative issues; the role of truth and truth-value intuitions in semantic theorizing; allegedly "subjective" attitude verbs such as 'find'; and vagueness ("Vagueness as Contextual Indecision"), which may be of broader interest. The development of Discourse Contextualism in this book sheds light on general features of meaning and communication, and the diverse ways context affects and is affected by uses of language.