Protagoras criticized Homer for making the word for "wrath" feminine (Aristotle, Sophistic Refutations 14) and for praying to the Muse with an imperative (Aristotle, Poetics 19). Plato depicts Protagoras criticizing the poet Simonides for contradicting himself, and then shows Socrates and Prodicus arguing to the contrary that Protagoras has conflated the senses of the words "be" and "become" (Protagoras 339a-340c).