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.