Abstract

Claims about the distinctness or non-distinctness of introspective beliefs from the mental states they are about have played a central role in the philosophy of introspection in the past fifty years or so. In A Materialist Theory of the Mind and work leading up to it, David Armstrong famously argued against infallibilist theories of introspection, and in defence of his own self-scanning theory of introspection, on the ground that introspective beliefs are distinct from the mental states they are about. Sydney Shoemaker, one of Armstrong’s most ardent critics, famously argued against Armstrong’s self-scanning theory of introspection, and in favour of his own constitutive theory of introspection, on the ground that introspective beliefs are not distinct from the mental states they are about. Yet the relevant sense or senses of distinctness involved here, and the role such claims about distinctness plays in such arguments, is notoriously hard to pin down. This essay explores some of the issues concerning distinctness and non-distinctness in the philosophy of introspection and in the dispute between Armstrong and Shoemaker and offers a reassessment of some of the central arguments offered in that dispute.