Aristotle, and W. Rhys Roberts. Rhetoric. Mineola, NY: Dover, 2004. Kindle Electronic Edition.
Book III, chapter 13.
Aristotle breaks all speeches into two main parts. “You must state your case, and you must prove it. You cannot either state your case and omit to prove it, or prove it without first having stated it” (Aristotle III.13, B. 1414b). The various subdivisions made by many rhetoricians all fall into these two areas. Many variations exist in the proof portion, as other counter arguments may be brought up and refuted.