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.
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.
A large debate around Plato’s Protagoras concerns the so-called ‘unity of virtue’, namely Socrates’ ultimate position on the relation between ἀρετή and the five concepts (justice, piety, prudence, wisdom, and courage) connected with it. In this article, I will draw on the language and ideas of the dialogue to question the semantic presupposition which all the scholars involved in the debate, whatever their views, have been sharing, namely that the five concepts can be considered as ἀρεταί, and not just as ‘good qualities’ (τὰ καλά), or ‘parts’ (μόρια), or ‘names’ (ὀνόματα) of ἀρετή, as Plato terms them.
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