According to what a refutation is and which are the aims of sophists Aristotle in Sophistical Refutations says: First we must consider the aims of those who strive and contend in disputations. These are five in number: refutation, fallacy, paradox, solecism, and the fifth element is to make their opponent prate. And that is, to compel him to say the same thing again and again.
Or it is to give the impression that they attain each of the above but not in fact. For before anything else they mostly choose to refute, secondly, to show that their interlocutor is committing a fallacy, thirdly, to lead him into paradox, and fourthly, to make him commit a solecism. That is to say, to make the respondent, from the argument, use a verbal abuse. And the last case is to make him repeat himself.
Bibliography: Aristotle, On Sophistical Refutations (165b.12 to 165b.22)
Translation: George Kotsalis