EUTHYDEMUS by Plato - Complete text

Page 17

Yes, Ctesippus, and we just now proved, as you may remember, that no man could affirm a negative; for no one could affirm that which is not.

And what does that signify? said Ctesippus; you and I may contradict all the same for that.

But can we contradict one another, said Dionysodorus, when both of us are describing the same thing? Then we must surely be speaking the same thing?

He assented.

Or when neither of us is speaking of the same thing? For then neither of us says a word about the thing at all?

He granted that proposition also.

But when I describe something and you describe another thing, or I say something and you say nothing - is there any contradiction? How can he who speaks contradict him who speaks not?

Here Ctesippus was silent; and I in my astonishment said: What do you mean, Dionysodorus? I have often heard, and have been amazed to hear, this thesis of yours, which is maintained and employed by the disciples of Protagoras, and others before them, and which to me appears to be quite wonderful, and suicidal as well as destructive, and I think that I am most likely to hear the truth about it from you. The dictum is that there is no such thing as falsehood; a man must either say what is true or say nothing. Is not that your position?

He assented.

But if he cannot speak falsely, may he not think falsely?

No, he cannot, he said.

Then there is no such thing as false opinion?

No, he said.

Then there is no such thing as ignorance, or men who are ignorant; for is not ignorance, if there be such a thing, a mistake of fact?

Certainly, he said.

And that is impossible?

Impossible, he replied.

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Plato : EUTHYDEMUS

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