Then, said the other, you do not learn that which he dictates; but he only
who does not know letters learns?

Nay, said Cleinias; but I do learn.

Then, said he, you learn what you know, if you know all the letters?

He admitted that.

Then, he said, you were wrong in your answer.

The word was hardly out of his mouth when Dionysodorus took up the
argument, like a ball which he caught, and had another throw at the youth.
Cleinias, he said, Euthydemus is deceiving you. For tell me now, is not
learning acquiring knowledge of that which one learns?

Cleinias assented.

And knowing is having knowledge at the time?

He agreed.

And not knowing is not having knowledge at the time?

He admitted that.

And are those who acquire those who have or have not a thing?

Those who have not.