This paper addresses three problems: the problem of formulating a coherent relativism, the Sorites paradox and a seldom noticed difficulty in the best intuitionistic case for the revision of classical logic. A response to the latter is proposed which, generalised, contributes towards the solution of the other two. The key to this response is a generalised conception of indeterminacy as a specific kind of intellectual bafflement-Quandary. Intuitionistic revisions of classical logic are merited wherever a subject matter is conceived both as (...) liable to generate Quandary and as subject to a broad form of evidential constraint. So motivated, the distinctions enshrined in intuitionistic logic provide both for a satisfying resolution of the Sorites paradox and a coherent outlet for relativistic views about, e.g., matters of taste and morals. An important corollary of the discussion is that an epistemic conception of vagueness can be prised apart from the strong metaphysical realism with which its principal supporters have associated it, and acknowledged to harbour an independent insight. (shrink)

Frank Jackson champions the cause of conceptual analysis as central to philosophical inquiry. In recent years conceptual analysis has been undervalued and widely misunderstood, suggests Jackson. He argues that such analysis is mistakenly clouded in mystery, preventing a whole range of important questions from being productively addressed. He anchors his argument in discussions of specific philosophical issues, starting with the metaphysical doctrine of physicalism and moving on, via free will, meaning, personal identity, motion, and change, to ethics and the philosophy (...) of color. In this way the book not only offers a methodological program for philosophy, but also casts new light on some much-debated problems and their interrelations. (shrink)

Many philosophers have thought that colours or flavours or values are in some way less objective than shape or mass or motion. This paper explores the approach to capturing this thought that is based on the idea of ‘ response-dependence ’. First, it is argued that the conceptions of response-dependence developed by Mark Johnston, Philip Pettit and Crispin Wright fail to capture this thought adequately. Then, the rest of the paper proposes an alternative conception, based in part on Kit Fine's (...) notion of " essence ", which looks more likely to succeed in capturing the thought adequately. (shrink)

This chapter defends a version of the indexical contextualist form of moderate relativism: the attempt to endorse appearances of faultless disagreement within the framework in which a sentence at a context at the index of the context determines its appropriate truth-value. Many object that any such an indexical proposal would fail to account for intuitions of (genuine) disagreement as revealed in ordinary disputes in the domain. The defence from this objection exploits presuppositions of commonality to the effect that the addressee (...) is relevantly like the speaker of the context. (shrink)

Tesis doctoral presentada en el departament de Lògica Història i Filosofia de la Ciencia de la Universitat de Barcelona per optar al títol de Doctor en Filosofia.