Abstract
This article deals with self-knowledge of beliefs. There are several mental states with their own peculiarities. Desires, judgments, feelings, emotions and beliefs. The focus of the article is on the know-ledge of one’s beliefs. Self-knowledge has characteristics, namely, first-person authority, aprioristic character, cognitive-discriminative capacity, infallibility, omniscience, asymmetry between the first and third person and impossibility of misuse of the pronoun “I” (SILVA FILHO, 2013, p. 33, n.2). In the everyday realm of common sense, there is no doubt about the self-attribution of beliefs, but concepts are not always used correctly, that is, there is an incomplete unders-tanding of one’s beliefs. However, does attributing rationality to the agent require knowledge of one’s beliefs? According to Coliva (2016), there are dispositional beliefs and as commitment. With respect to the first type of belief, the agent has no epistemic responsibility, with the second yes. Therefore, self-knowledge of doxastic beliefs as commit-ment requires rationality of the epistemic agent, because there is the epistemic responsibility of the rational agent.