Abstract

Could there be a creature whose knowledge of its own mental states or properties is perceptual and whose knowledge of the physical properties of external objects is introspective? The answer to this question obviously depends not only on how one conceives of the distinction between mental and physical properties but also on one’s conception of the differences between perceptual and introspective knowledge. On one view, introspective knowledge enjoys a range of epistemic privileges which perceptual knowledge lacks. On this account, a creature whose knowledge of the physical properties of external objects is introspective would be one whose knowledge of such properties is epistemically privileged in the way that our knowledge of our own mental properties is epistemically privileged. By the same token, a creature whose knowledge of its own mental properties is perceptual would be one whose knowledge of its mental properties is subject to what McGinn describes as “the frailties and fallibility of perceptual knowledge.”