Hilary Kornblith

We sometimes stop to reflect on our mental states, and such reflection can lead, at times, to changing our minds. It can, as well, lead us to endorse the very attitudes which we previously held. Such reflective endorsement has been called upon to play a wide range of roles in philosophical theorizing. It has been thought to ground a distinction between two fundamentally different kinds of knowledge: reflective knowledge and mere animal knowledge. It has been thought to serve as a ground for rational change of belief. It has been called upon to explain the possibility of freedom of the will. And it has been brought into service to explain the source of normativity. This chapter argues that it can play none of these roles.

Hilary Kornblith presents an account of inductive inference that addresses both its metaphysical and epistemological aspects. He argues that inductive knowledge is possible by virtue of the fit between our innate psychological capacities and the causal structure of the world. Kornblith begins by developing an account of natural kinds that has its origins in John Locke's work on real and nominal essences. In Kornblith's view, a natural kind is a stable cluster of properties that are bound together in nature. The existence of such kinds serves as a natural ground of inductive inference. Kornblith then examines two features of human psychology that explain how knowledge of natural kinds is attained. First, our concepts are structured innately in a way that presupposes the existence of natural kinds. Second, our native inferential tendencies tend to provide us with accurate beliefs about the world when applied to environments that are populated by natural kinds.