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GORGIAS: Of course.

SOCRATES: But does not the art of medicine, which we were just now mentioning, also make men able to understand and speak about the sick?

GORGIAS: Certainly.

SOCRATES: Then medicine also treats of discourse?

GORGIAS: Yes.

SOCRATES: Of discourse concerning diseases?

GORGIAS: Just so.

SOCRATES: And does not gymnastic also treat of discourse concerning the good or evil condition of the body?

GORGIAS: Very true.

SOCRATES: And the same, Gorgias, is true of the other arts:—all of them treat of discourse concerning the subjects with which they severally have to do.

GORGIAS: Clearly.

SOCRATES: Then why, if you call rhetoric the art which treats of discourse, and all the other arts treat of discourse, do you not call them arts of rhetoric?

GORGIAS: Because, Socrates, the knowledge of the other arts has only to do with some sort of external action, as of the hand; but there is no such action of the hand in rhetoric which works and takes effect only through the medium of discourse. And therefore I am justified in saying that rhetoric treats of discourse.