Institutio Oratoria

The schools, it is true, give no instruction either as to theory or practice in this subject, and skill in examination comes rather from natural talent or practice. If, however, I am asked to point out a model for imitation, I can recommend but one, namely that which may be found in the dialogues of the Socratics and more especially of Plato, in which the questions put are so shrewd that although individually as a rule the answers are perfectly satisfactory to the other side, yet the questioner reaches the conclusion at which he is aiming.