Logic as a philosophical discipline underwent a radical change from the argumentative perspective of the new rhetoric. This approach, although it had already been approached theoretically and epistemologically, did not take off until the publication of the text Perelman and Lucie Olbrechts-Tyteca. This led to the division of logic into two areas: formal logic and informal logic. The former, with a longer tradition, was aimed at demonstrat mathematical logic and set theory, rules of inference, classification and grouping.