STRANGER: Then what we call an image is in reality really unreal.
THEAETETUS: In what a strange complication of being and not-being we are involved!
STRANGER: Strange! I should think so. See how, by his reciprocation of opposites, the many-headed Sophist has compelled us, quite against our will, to admit the existence of not-being.
THEAETETUS: Yes, indeed, I see.
STRANGER: The difficulty is how to define his art without falling into a contradiction.
THEAETETUS: How do you mean? And where does the danger lie?
STRANGER: When we say that he deceives us with an illusion, and that his art is illusory, do we mean that our soul is led by his art to think falsely, or what do we mean?
THEAETETUS: There is nothing else to be said.
STRANGER: Again, false opinion is that form of opinion which thinks the opposite of the truth:—You would assent?
THEAETETUS: Certainly.