Frank Jackson

JP argue that expressivists must admit that becoming competent with ethical utterances involves learning to make them only when one believes one has the relevant attitude. For expressivists hold that communicating our attitudes is the function of ethical utterances, in which case sincerity demands that we not utter an ethical sentence unless we believe we have the relevant attitude. So (b) is false, as long as we suppose that this commitment, as reflected in well-entrenched and clear-cut (henceforth, 'robust' abbreviates 'well-entrenched and clear-cut') conventions, means that ethical utterances express one's belief that one has the relevant attitude. This, in turn, means that (a) is false, if we grant that a belief expressed in virtue of such conventions provides the utterance's truth-conditions.

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

We respond to Mark van Roojen's discussion of our 'Moral Functionalism and Moral Motivation', "Philosophical Quarterly", 45 (January, 1995): 20-40. There we assumed that ethical language makes claims about how things are and sought to make plausible under this assumption a view of moral language modelled on David Lewis's treatment of theoretical terms. Van Roojen finds the idea of treating ethical terms as theoretical terms attractive but doubts that we 'have succeeded in offering a reduction of evaluative properties to natural properties'. Our reply turns on what we learn from the supervenience of the ethical on the descriptive