Theaetetus

Plato’s dialogue on the question of what knowledge is. Socrates presses the young mathematician Theaetetus through three answers, that knowledge is perception, that it is true belief, that it is true belief with an account, and dismantles each, ending without a conclusion. Along the way come the refutation of Protagoras’s relativism and the famous digression on the philosopher’s detachment from public life. M. J. Levett’s translation, revised by Myles Burnyeat, with Burnyeat’s long introduction.