Rhetoric Day 87.1
[T]he six parts of a discourse: the Introduction, Statement of Facts, Division, Proof, Refutation, and Conclusion. The Introduction is the beginning of the discourse, and by it the hearer’s mind is prepared for attention. The Narrative or Statement of Facts sets forth the events that have occurred or might have occurred. By means of the Division we make clear what matters are agreed upon and what are contested, and announce what points we intend to take up. Proof is the presentation of our arguments, together with their corroboration. Refutation is the destruction of our adversaries’ arguments. The Conclusion is the end of the discourse, formed in accordance with the principles of art.
- Cicero "Ad Herennium"