Then do you see that when a man appears to know many things, but is called by the name of a single art, there is something wrong about this impression, and that, in fact, the person who labors under this impression in connexion with any art is clearly unable to see the common principle of the art, to which all these kinds of knowledge pertain, so that he calls him who possesses them by many names instead of one?
Something like that is very likely to be the case.
We must not let that happen to us in our search through lack of diligence. So let us first take up again one of our statements about the sophist. For there is one of them which seemed to me to designate him most plainly.
Which was it?
I think we said he was a disputer.
Yes.
And did we not also say that he taught this same art of disputing to others?
Certainly.
Now let us examine and see what the subjects are about which such men say they make their pupils able to dispute. Let us begin our examination
at the beginning with this question: Is it about divine things which are invisible to others that they make people able to dispute?
That is their reputation, at any rate.
And how about the visible things of earth and heaven and the like?
Those are included, of course.
And furthermore in private conversations, when the talk is about generation and being in general, we know (do we not?) that they are clever disputants themselves and impart equal ability to others.
Certainly.
And how about laws and public affairs in general? Do they not promise to make men able to argue about those?
Yes, for nobody, to speak broadly, would attend their classes if they did not make that promise.
However in all arts jointly and severally what the professional ought to answer to every opponent is written down somewhere and published that he who will may learn.
You seem to refer to the text-books of Protagoras
on wrestling and the other arts.
Yes, my friend, and to those of many other authors. But is not the art of disputation, in a word, a trained ability for arguing about all things?
Well, at any rate, it does not seem to leave much out.
For heaven’s sake, my boy, do you think that is possible? For perhaps you young people may look at the matter with sharper vision than our duller sight.