Abstract

Dayton's account of lewis' pragmatic contradiction seriously misconstrues this key concept by analyzing it in terms of logical contradiction. this order of analysis is explicitly rejected by lewis as the reverse of the proper order in which the pragmatic concept is foundational to logic and epistemology. i outline a correct account of pragmatic contradiction. then lewis' application of the idea to moral skepticism and the liar paradox is reconsidered, and is seen to vindicate his claim that both skeptic and liar are defeated by a non-fallacious "ad hominem" consisting of a demonstration that each is in pragmatic contradiction