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?