Parmenides, fr. 7.1



“You can never prove that what doesn’t exist exists”


οὐ γὰρ μήποτε τοῦτο δαμῆι εἶναι μὴ ἐόντα·


Is the opposite true as well?

Now, I’m confused.

Zeno (Aristotle, Metaphysics, Β 4.1001 b7)



[Zeno said that] “That which does not make something bigger or smaller when it is added or taken away is not real.”


ὃ γὰρ  µήτε προστιθέµενον µήτε ἀφαιρούµενον ποιεῖ µεῖζον

µηδὲ ἔλαττον, οὔ φησιν εἶναι τοῦτο τῶν ὄντων


From Zeno of Elea, a student of Parmenides.  Famous for paradoxes (he even appears as an interlocutor for Socrates in Plato’s Parmenides).

(Not the Zeno who founded Stoicism)