On the evidence of Plato’s Theaetetus and Phaedo the author claims that Protagoras argued against changement. The paper develops in four steps. First, the paradox of the dices is taken into account. Then four parallels to this argument are recovered in Socrates’ autobiography in Plato’ Phaedo. Third, the four parallels are identified with the wise causes of the antilogies. Finally, the author addresses the objection that both Theaetetus in the Theaetetus and Socrates in the Phaedo show serious wondering and dismiss such arguments as merely sophisms by focusing on how the notion of wondering is used in the Euthydemus.