. . . ἔοικα γοῦν τούτου γε σμικρῷ τινι αὐτῷ τούτῳ σοφώτερος εἶναι, ὅτι ἃ μὴ οἶδα οὐδὲ οἴομαι εἰδέναι.
I have appeared at any rate, in this little particular thing, to be wiser than this [other person] because what I do not know I do not suppose to know.
—Plato (Socrates), Apology 21d