Institutio Oratoria

On the other hand there are certain arguments which at times may best be treated with contempt, as being trivial or irrelevant. This course is frequently pursued by Cicero, indeed this affectation of indifference is sometimes carried so far that we trample disdainfully under foot arguments which we should never succeed in refuting by counter-argument.

Since, however, the majority of such arguments are based on similarity, we must make diligent search to discover if any discrepancy is to be found in what is put forward. It is easy to do this where points of law are concerned. For the law was drafted to cover cases quite other than the present, and consequently it is all the easier to show the difference between case and case. As to parallels drawn from dumb animals or inanimate objects, they are easy to make light of.

Examples drawn from facts, if damaging to our case, must be treated in various ways: if they are ancient history, we may call them legendary, while if they are undoubted, we may lay stress on their extreme dissimilarity. For it is impossible for two cases to be alike in every detail. For instance, if the case of Ahala,2 by whom Maelius was killed, is quoted to justify Nasica for the slaying of Tiberius Gracchus, we may argue that Maelius was endeavouring to make himself king, while all that Gracchus had done was to bring forward laws in the interest of the people, and that while Ahala was Master of the Horse, Nasica was a private citizen. In the last resort, if all else prove unavailing, we must see if