The problematic relationship between theory and practice is the core of this paper, with special regard to rhetoric as theory (as an explicative system supported by a rhetorician, that is a procedure of proof) and rhetoric as practice (as an operative system applied by an orator, that is a strategy of persuasion). The practice of argumentation is often bad from the cognitive, methodological, ethical and social point of view, but the theory of argumentation is valuable. And for philosophy, the argumentation, the instrument of rhetoric, is the only possible procedure of proof.... [Leer más...]