Institutio Oratoria

Gorgias indeed felt so strongly that it was the orator's duty to speak on every subject, that he used to allow those who attended his lectures to ask him questions on any subject they pleased. Hermagoras also asserted that the material of oratory lay in the cause and the questions it involved, thereby including every subject that can be brought before it.

If he denies that general questions [*](See III V. 12–16.) are the concern of oratory, he disagrees with me: but if they do concern rhetoric, that