Abstract
<jats:title>Abstract</jats:title> <jats:p>In this opinionated introduction, we explain the rationale for a coordinated study of self-knowledge and knowledge a priori. After outlining the reasons why each of these species of knowledge presents a prima facie challenge to a broadly naturalistic outlook on epistemology, we present an argument that both are indispensable for rational deliberation, if the actions and beliefs that result from a deliberation are to be seen as outcomes for which the agent can be held responsible. We then explore some of the ways in which self-knowledge and a priori knowledge are explanatorily interdependent, looking at cases where the agent’s possession of one appears to enable their acquisition of the other. The introduction ends with a detailed critical survey of the contributions to the volume.</jats:p>