STRANGER: And of disputation, that sort which is only a discussion about contracts, and is carried on at random, and without rules of art, is recognized by the reasoning faculty to be a distinct class, but has hitherto had no distinctive name, and does not deserve to receive one from us. THEAETETUS: No; for the different sorts of it are too minute and heterogeneous. STRANGER: But that which proceeds by rules of art to dispute about justice and injustice in their own nature, and about things in general, we have been accustomed to call argumentation (Eristic)? THEAETETUS: Certainly. STRANGER: And of argumentation, one sort wastes money, and the other makes money. THEAETETUS: Very true. STRANGER: Suppose we try and give to each of these two classes a name. THEAETETUS: Let us do so. STRANGER: I should say that the habit which leads a man to neglect his own affairs for the pleasure of conversation, of which the style is far from being agreeable to the majority of his hearers, may be fairly termed loquacity: such is my opinion. THEAETETUS: That is the common name for it. STRANGER: But now who the other is, who makes money out of private disputation, it is your turn to say. THEAETETUS: There is only one true answer: he is the wonderful Sophist, of whom we are in pursuit, and who reappears again for the fourth time. STRANGER: Yes, and with a fresh pedigree, for he is the money-making species of the Eristic, disputatious, controversial, pugnacious, combative, acquisitive family, as the argument has already proven. THEAETETUS: Certainly. STRANGER: How true was the observation that he was a many-sided animal, and not to be caught with one hand, as they say! THEAETETUS: Then you must catch him with two. STRANGER: Yes, we must, if we can. And therefore let us try another track in our pursuit of him: You are aware that there are certain menial occupations which have names among servants? THEAETETUS: Yes, there are many such; which of them do you mean? STRANGER: I mean such as sifting, straining, winnowing, threshing. THEAETETUS: Certainly. STRANGER: And besides these there are a great many more, such as carding, spinning, adjusting the warp and the woof; and thousands of similar expressions are used in the arts. THEAETETUS: Of what are they to be patterns, and what are we going to do with them all? STRANGER: I think that in all of these there is implied a notion of division. THEAETETUS: Yes. STRANGER: Then if, as I was saying, there is one art which includes all of them, ought not that art to have one name? THEAETETUS: And what is the name of the art? STRANGER: The art of discerning or discriminating. THEAETETUS: Very good. STRANGER: Think whether you cannot divide this. THEAETETUS: I should have to think a long while. STRANGER: In all the previously named processes either like has been separated from like or the better from the worse. THEAETETUS: I see now what you mean.