Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
The act itself again sometimes involves a single question, as, for example,
For the accused either confines himself to denying that he did it or accuses another of having done it. Further, there is more than one way of transferring the charge to another. At times this results in mutual accusation, which the Greeks call ἀντικατηγορία, and some of our own authors concertative accusation. [*](i.e. mutual or reciprocal accusation, see VII. i. 3. ) At times, on the other hand, the charge is transferred to some person who cannot be brought to trial, and may be either known or unknown: again, if the person is known, he may be someone outside the case or the victim himself, who may be alleged to have committed suicide.
In such cases we compare characters, motives and other circumstances in the same way as in eases of mutual accusation. Cicero, for instance, in the pro Vareno diverts the charge from the accused to the slaves of Ancharius and in the pro Scauro throws the suspicion of Bostar's murder upon his mother.
There is also a different form of comparison, which comes into play when both parties claim the credit of some act, and yet another kind, when the question is not as between two persons, but as between two acts; that is to say, the question is not which of the two committed an act, but which of two acts was committed. Finally, if the act and the identity of the author are both
I have not committed adultery,
I have not sought to establish myself as tyrant.In cases of murder or poisoning the denial is often divided as follows: