Online research in philosophy

In a recent paper, Philip Kitcher boldly challenges the very idea of objectivism in ethics.1 The structure of his argument is disarmingly simple: objectivist moral theories must take a certain explanatory form. If they take that form, then they fail on their own terms. Hence objectivism cannot be a satisfactory theory. Proving impossibility is a dicey matter, and Kitcher qualifies his premises and conclusions in ways that my summary misses. His arguments are nuanced, and he never states his conclusion as baldly as I have. Moreover, he focuses on one particular form of objectivism—Thomas Hurka’s perfectionism2—and an uncharitable reading of Kitcher would accuse him of hasty generalization: the demise of objectivism surely does not follow from Hurka’s purported shortcomings. Nevertheless, the thrust of the argument is as I have said: objectivism has no future.

C. L. Hardin has argued that the colour opponency of the vision system leads to chromatic subjectivism: chromatic sensory states reduce to neurophysiological states. Much of the force of Hardin's argument derives from a critique of chromatic objectivism. On this view chromatic sensory states are held to reduce to an external property. While I agree with Hardin's critique of objectivism it is far from clear that the problems which beset objectivism do not apply to the subjectivist position as well. I develop a critique of subjectivism that parallels Hardin's anti-objectivist argument.

Relativism may take a coherent and self-consistent form, by replacing a bivalent logic with a many-valued logic; “incongruent” propositions may then be valid, that is, propositions that on a bivalent model but not now would be or would yield contradictories. I reject “relationalism,” any relativism in accord with which “true” means “true-for-x” (in accord with the usual reading of Plato’s Theaetetus). I show how epistemic pluralism is an analogue of the “is”/“appears” distinction and presupposes a form of objectivism, however attenuated. By “objectivism” I understand the thesis that what obtains independently in the world is cognitively accessible, is contextless and free of interpretation. The admitted indemonstrability of objectivism affects the force of pluralism and cannot disallow relativism. If objectivity is an artifact of inquiry, then relativism and pluralism can be reconciled.

The views of linguistic analysts and objectivists are explored with regard to the question of interactionism. It is argued that the admission of a logical difference between explanation by cause and explanation by motive cannot disqualify causal explanations of human action, cannot be construed as challenging the competence of science, and cannot count against interactionism. It is also argued that objectivist programs for eliminating mentalistic concepts either implicitly admit interactionism or cannot distinguish relevantly between interactionism and parallelism.