The document discusses Vilfredo Pareto's views on argumentation theory. It summarizes Pareto's view that arguments are comprised of two elements: residues, which directly correspond to non-logical sentiments, and derivations, which are logical or pseudo-logical reasonings that attempt to clothe residues in logic. Pareto believed that derivations derive their force not from logic but from the sentiments they express. Effective arguments must transform thought into sentiment in order to influence people.