Kitap 4
pr.90
Above all we must see that we do not contradict ourselves, a slip which is far from rare on the part of spinners of fiction: for some things may put a most favourable complexion on portions of our case, and yet fail to agree as a whole. Further, what we say must not be at variance with the admitted truth. Even in the schools, if we desire a gloss, we must not look for it outside the facts laid down by our theme.
pr.91
In either case the orator should bear clearly in mind throughout his whole speech what the fiction is to which he has committed himself, since we are apt to forget our falsehoods, and there is no doubt about the truth of the proverb that a liar should have a good memory.
pr.92
But whereas, if the question turns on some act of our own, we must make one statement and stick to it, if it turns on an act committed by others, we may cast suspicion on a number of different points. In certain controversial themes of the schools, however, in which it is assumed that we have put a question and received no reply, we are at liberty to enumerate all the possible answers that might have been given.
