These difficulties are further compounded by the fact that Gorgias's rhetoric is frequently elusive and confusing; he makes many of his most important points using elaborate, but highly ambiguous, metaphors, similes, and puns. Many of Gorgias's propositions are also thought to be sarcastic, playful, or satirical. In his treatise "On Rhetoric", Aristotle characterizes Gorgias's style of oratory as "pervasively ironic" and states that Gorgias recommended responding to seriousness with jests and to jests with seriousness. Gorgias frequently blurs the lines between serious philosophical discourse and satire, which makes it extremely difficult for scholars to tell when he is being serious and when he is merely joking. Gorgias frequently contradicts his own statements and adopts inconsistent perspectives on different issues. As a result of all these factors, Scott Porter Consigny calls him "perhaps the most elusive of the polytropic quarry hunted in Plato's "Sophist".