Institutio Oratoria

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. )

I would further have an advocate realise the order in

V. Having dealt with these points to the best of my ability, I should have had no hesitation in proceeding to discuss arrangement, which is logically the next consideration, did I not fear that, since there are some who include judgment [*](See III. iii. 5 and 6.) under the head of invention, they might think that I had deliberately omitted all discussion of judgment, although personally I regard it as so inextricably blent with and involved in every portion of this work, that its influence extends even to single sentences or words, and it is no more possible to teach it than it is to instruct the powers of taste and smell.

Consequently, all I can do is now and hereafter to show what should be done or avoided in each particular case, with a view thereby to guide the judgment. What use then is it for me to lay down general rules to the effect that we should not attempt impossibilities, that we should avoid whatever contradicts our case or is common to both, and shun all incorrectness or obscurity of style? In all these cases it is common sense that must decide, and common sense cannot be taught.