Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
It may even be expedient to yield ground which the enemy thinks advantageous to himself: for in grasping at the fancied advantage he may be forced to surrender some greater advantage: at times, too, it may serve our purpose to give him a choice between two alternatives, neither of which
the mark of a shrewd debater to perceive what remarks impress the judge and what he rejects: this may often be detected from his looks, and sometimes from some action or utterance. Arguments which help us must be pressed home, while it will be wise to withdraw as gently as possible from such as are of no service. We may take a lesson from doctors who continue or cease to administer remedies according as they note that they are received or rejected by the stomach. Sometimes,
if we find difficulty in developing our point, it is desirable to raise another question and to divert the attention of the judge to it if this be feasible. For what can you do, if you are unable to answer an argument, save invent another to which your opponent can give no answer?
In most respects the rules to be observed in debate are, as I have said, [*](§2.) identical with those for the cross examination of witnesses, the only difference lying in the fact that the debate is a battle between advocates, whereas cross-examination is a fight between advocate and witness. To practise the art of debate is, however, far easier. For it is most profitable to agree with a fellow-student on some subject, real or fictitious, and to take different sides, debating it as would be done in the courts. The same may also be done with the simpler class of questions. [*](cp. II. i. 9 and v. x. 53. )