260
Stranger
Str. Perhaps the easiest way for you to understand is by following this line of argument.
5
Theaetetus
Theaet. What line?
Stranger
Str. We found that not-being was one of the classes of being, permeating all being.
Stranger
Str. So the next thing is to inquire whether it mingles with opinion and speech.
Theaetetus
Theaet. Why?
10
Stranger
Str. If it does not mingle with them, the necessary result is that all things are true, but if it does, then false opinion and false discourse come into being; for to think or say what is not—that is, I suppose, falsehood arising in mind or in words.
Theaetetus
Theaet. So it is.
Stranger
Str. But if falsehood exists, deceit exists.
Stranger
Str. And if deceit exists, all things must be henceforth full of images and likenesses and fancies.
15
Theaetetus
Theaet. Of course.
Stranger
Str. But we said that the sophist had taken refuge in this region and had absolutely denied the existence of falsehood: for he said that not-being could be neither conceived nor uttered, since not-being did not in any way participate in being.
Theaetetus
Theaet. Yes, so it was.