Aristotle, and W. Rhys Roberts. Rhetoric. Mineola, NY: Dover, 2004. Kindle Electronic Edition.
Book III, chapter 18.
Aristotle turns his attention in III.18 to the interrogation. When an opponent has shown a weakness in answer to a question, pushing more with questions may make the opponent seem absurd (Aristotle III.18, B. 1418b). It is also a use of interrogation to see the opponent’s concession to a premise and then to state the conclusion against him (Aristotle III.18, B. 1419a). This is similar to the practice of showing from an opponent that he actually disagrees with a nearly universal concept, or stopping the opponent from equivocation (Aristotle III.18, B. 1419a). It is also possible to dismantle a serious argument by turning it into a joke (Aristotle III.18, B. 1419b). Particularly observation of irony may be very effective.