In Plat. Prot. 349d2-351b2, first Socrates leads Protagoras to acknowledge that wisdom and courage are the same thing, then Protagoras accuses him of having put in his mouth words that he never said. Starting from a new reconstruction of the logic of Socrates’ demonstration, I will show how this is more complex, sophistic, and corresponding to Protagoras’ accusation than what is usually believed.

Dissoi Logoi 4.6 presents a beautiful self-refutation argument, which I analyse here, offering a different assessment of its relation to self-contradiction and the Liar paradox from the only one available in the literature.