Certainly, of the knowledge which I have.
That makes no difference;—and must you not, if you are knowing, know all things?
Certainly not, I said, for there are many other things which I do not know.
And if you do not know, you are not knowing.
Yes, friend, of that which I do not know.
Still you are not knowing, and you said just now that you were knowing; and therefore you are and are not at the same time, and in reference to the same things.
A pretty clatter, as men say, Euthydemus, this of yours! and will you explain how I possess that knowledge for which we were seeking? Do you mean to say that the same thing cannot be and also not be; and therefore, since I know one thing, that I know all, for I cannot be knowing and not knowing at the same time, and if I know all things, then I must have the knowledge for which we are seeking—May I assume this to be your ingenious notion?
Out of your own mouth, Socrates, you are convicted, he said.
Well, but, Euthydemus, I said, has that never happened to you? for if I am only in the same case with you and our beloved Dionysodorus, I cannot complain. Tell me, then, you two, do you not know some things, and not know others?
Certainly not, Socrates, said Dionysodorus.
What do you mean, I said; do you know nothing?
Nay, he replied, we do know something.
Then, I said, you know all things, if you know anything?
Yes, all things, he said; and that is as true of you as of us.
O, indeed, I said, what a wonderful thing, and what a great blessing! And do all other men know all things or nothing?
Certainly, he replied; they cannot know some things, and not know others, and be at the same time knowing and not knowing.
Then what is the inference? I said.
They all know all things, he replied, if they know one thing.
O heavens, Dionysodorus, I said, I see now that you are in earnest; hardly have I got you to that point. And do you really and truly know all things, including carpentering and leather-cutting?
Certainly, he said.
And do you know stitching?
Yes, by the gods, we do, and cobbling, too.
And do you know things such as the numbers of the stars and of the sand?
Certainly; did you think we should say No to that?
By Zeus, said Ctesippus, interrupting, I only wish that you would give me some proof which would enable me to know whether you speak truly.