Kitap 3
13.1
A speech has two parts. It is necessary to state the subject, and then to prove it. Wherefore it is impossible to make a statement without proving it, or to prove it without first putting it forward; for both he who proves proves something, and he who puts something forward does so in order to prove it.
13.2
The first of these parts is the statement of the case, the second the proof, a similar division to that of problem and demonstration.
