In some of Plato's early dialogues we find a concern with correctly ascertaining the contents of a particular kind of one's own psychological states, cognitive states. Indeed, one of the achievements of the elenctic method is to facilitate cognitive self-knowledge. In the Alcibiades, moreover, Plato interprets the Delphic injunction, 'know yourself, as crucially requiring cognitive self-knowledge, and ending in knowing one-self as subject to particular epistemic norms. Epistemic authority for self-knowledge is, for Plato, conferred on the basis of correct application of norms to cognitive self-ascriptions, and not confined to the first-personal perspective. This implies first-personal plural epistemic authority for self-knowledge.
