Institutio Oratoria

XI. As soon as these points are ascertained, the next step, according to Hermagoras, should be to consider what is the question at issue, the line of defence, the point for the judge's decision and the central point, or, as others call it, the foundation of the case. [*]( This highly technical chapter will be largely unintelligible to those who have not read chapter vi. Those who have no stomach for such points would do well to skip §§ 1–20; they will however find consolation in § 21 sqq., where Quintilian says what he really thinks of such technicalities. ) The question in its more general sense is taken to mean everything on which two or more plausible opinions may be advanced.

In forensic subjects however it must be taken in two senses: first in the sense in which we say that a controversial matter involves many questions, thereby including all minor questions; secondly in the sense of the main question on which the case turns. It is of this, with which the basis originates, that I am now speaking. We ask whether a thing has been done, what it is that has been done, and whether it was rightly done.

To these Hermagoras and Apollodorus and many other writers have given the special name of questions; Theodorus on the other hand, as I have already said, calls them general heads, while he designates minor questions or questions dependent on these general heads as special heads. For it is agreed that question may spring from question, and species be subdivided into other species.

This main question, then, they call the ζήτημα. The line of defence is the method by which an admitted act is defended. I see no reason why I should not use the same example to illustrate this point that has been used by practically all my predecessors. Orestes has killed his mother: the fact is admitted. He pleads that he was justified in so doing: the basis will be one of quality, the question, whether he was justified in his action, the line of defence that Clytemnestra killed her husband, Orestes' father. This is called the αἴτιον or motive.

Some have drawn a distinction between αἴτιον and αἰτίαν making αἴτιον mean the cause of the trial, namely the murder of Clytemnestra, αἰτία the motive urged in defence, namely the murder of Agamemnon. But there is such lack of agreement over these two words, that some make αἰτία the cause of the trial and αἴτιον the motive of the deed, while others reverse the meanings. If we turn to Latin writers we find that some have given these causes the names of initinum, the beginning, and ratio, the reason, while others give the same name to both.