 Many versions of agentialism are inspired by a broadly Kantian approach to reason and agency (Burge 1996; Moran 2001; Bilgrami 2006; Boyle 2009). On this approach, a thinker’s most basic self-conception (as an “I”) is agential: we see ourselves as authors of our beliefs and intentions, rather than as an inert thing in which attitudes merely occur. This authorial agency is essentially rational: it is exercised when we believe or intend on the basis of reasons. Agentialism differs from rationalism in taking our capacity for self-knowledge to derive from our agency and not (just) from our rationality. Agentialists maintain that our rational agency guarantees that we are capable of—or even that we possess—self-knowledge.