Institutio Oratoria

Quintilian

Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.

Sometimes again we have recourse to quality, as in the question,

What is
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rhetoric? Is it the power to persuade or the science of speaking well?

This form of question is of frequent occurrence in the courts. For instance, the question may arise whether a man caught in a brothel with another man's wife is an adulterer. Here there is no doubt about the name; it is the significance of the act which is in doubt, since the question is whether he has committed any sin at all. For if he has sinned, his sin can only be adultery.

There is a different type of question where the dispute is concerned with the term to be applied, which depends on the letter of the law: it is a form of question which can only arise in the courts from the actual words on which the dispute turns. Take as examples the questions, whether suicide is a form of homicide, or whether the man who forces a tyrant to kill himself can be considered a tyrannicide, or whether magical incantations are equivalent to the crime of poisoning. In all these cases there is no doubt about the facts, for it is well known that there is a difference between killing oneself and killing another, between slaying a tyrant and forcing him to suicide, between employing incantations and administering a deadly draught, but we enquire whether we are justified in calling them by the same name.