Institutio Oratoria

1. To begin with it may be noted that the division laid down by Aristotle [*](Rhet. i. ii. 2. ) has met with almost universal approval. It is to the effect that there are some proofs adopted by the orator which lie outside the art of speaking, and others which he himself deduces or, if I may use the term, begets out of his case. The former therefore have been styled ἄτεχνοι or inartificial proofs, the latter ἔντεχνοι or artificial.