Kitap 2
18.5
When these topics have been determined, we will endeavor to say what we can in general about enthymemes and examples, in order that, when we have added what remains, we may carry out what we proposed at the outset. Now, of the commonplaces amplification is most appropriate to epideictic rhetoric, as has been stated;1.9.40. Amplication is to be understood of the exaggeration of both great and small things. It is most suited to epideictic oratory, in which there is no doubt as to the facts; so that it is only necessary to accentuate their importance or non-importance. the past to forensic, since things past are the subject of judgement; and the possible and future to deliberative.
19.1
Let us first speak of the possible and the impossible. If of two contrary things it is possible that one should exist or come into existence, then it would seem that the other is equally possible; for instance, if a man can be cured, he can also be ill; for the potentiality of contraries, qua contraries, is the same.As a general rule, from their nature as contraries, although it may not be true in particular cases. If a man is ill, he may also be well, although in particular cases certain qualities may make him more liable to one or the other, e.g. he may suffer from an incurable disease (Schrader). Similarly, if of two like things the one is possible, so also is the other.
19.2
And if the harder of two things is possible, so also is the easier.
