Just as our beliefs about empirical matters can be mistaken in any given case, and we can make genuine discoveries about empirical reality, just so with rationality. Clearly this claim is much more plausible with the stronger conception of rationality that McDowell is urging than the weaker conception limited to mere deductive relations. McDowell goes on to argue that because of this feature, we must be open to the possible reinterpretation of a person’s behavior and psychological states in ligh