SOC. Well, it is just this that I am in doubt about and cannot fully grasp by my own efforts—what knowledge really is. 

 
Can we tell that? What do you say? Who of us will speak first? And he who fails, and whoever fails in turn, shall go and sit down and be donkey, as the children say when they play ball; and whoever gets through without failing shall be our king and shall order us to answer any questions he pleases. Why are you silent? I hope, Theodorus, I am not rude, through my love of discussion and my eagerness to make us converse and show ourselves friends and ready to talk to one another. THEO. That sort of thing would not be at all rude, Socrates; but tell one of the youths to answer your questions; for I am unused to such conversation and, moreover, I am not of an age to accustom myself to it. But that would be fitting for these young men, and they would improve much more than I; for the fact is, youth admits of improvement in every way. Come, question Theaetetus as you began to do, and do not let him off. SOC. Well, Theaetetus, you hear what Theodorus says,
 
and I think you will not wish to disobey him, nor is it right for a young person to disobey a wise man when he gives instructions about such matters. Come, speak up well and nobly. What do you think knowledge is? THEAET. Well, Socrates, I must, since you bid me. For, if I make a mistake, you are sure to set me right. SOC. Certainly, if we can. THEAET. Well then, I think the things one might learn from Theodorus are knowledge—geometry and all the things you spoke of just now—and also cobblery and
 
the other craftsmen’s arts; each and all of these are nothing else but knowledge. SOC. You are noble and generous, my friend, for when you are asked for one thing you give many, and a variety of things instead of a simple answer. THEAET. What do you mean by that, Socrates? SOC. Nothing, perhaps; but I will tell you what I think I mean. When you say cobblery you speak of nothing else than the art of making shoes, do you? THEAET. Nothing else. SOC. And when you say carpentry ? Do you mean anything else than the art of making wooden furnishings? THEAET. Nothing else by that, either. SOC. Then in both cases you define that to which each form of knowledge belongs? THEAET. Yes. SOC. But the question, Theaetetus, was not to what knowledge belongs, nor how many the forms of knowledge are; for we did not wish to number them, but to find out what knowledge itself really is. Or is there nothing in what I say? THEAET. Nay, you are quite right.