THEAETETUS: Yes.

STRANGER: And controversy may be of two kinds.

THEAETETUS: What are they?

STRANGER: When long speeches are answered by long speeches, and there is
public discussion about the just and unjust, that is forensic controversy.

THEAETETUS: Yes.

STRANGER: And there is a private sort of controversy, which is cut up into
questions and answers, and this is commonly called disputation?

THEAETETUS: Yes, that is the name.

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.