Kitap 3
5.16
As to the subject under discussion its practicability is either certain or uncertain. In the latter case this will be the chief, if not the only point for consideration; for it will often happen that we shall assert first that something ought not to be done, even if it can be done, and secondly, that it cannot be done. Now when the question turns on such points as to whether the Isthmus can be cut through, the Pontine Marshes drained, or a harbour constructed at Ostia, or whether Alexander is likely to find land beyond the Ocean, the theme of a suasoria of the elder Seneca ( Suas. i.). Alexander deliberates whether to sail forth into the ocean. we make use of conjecture.
5.17
But even in connection with things that are undoubtedly feasible, there may at times be room for conjecture, as for instance in questions such as whether Rome is ever likely to conquer Carthage, whether Hannibal will return to Africa if Scipio transports his army thither, or whether the Samnites are likely to keep faith if the Romans lay down their arms. sc. at the Caudine Forks: see above, § 3. There are some things too which we may believe to be both feasible and likely to be carried into effect, but at another time or place or in another way.
