Abstract

NARVAEZ, Moisés D.. The New Rhetorics of Chaïm Perelman as a Theory of Practical Rationality. Eidos [online]. 2019, n.30, pp.104-129. ISSN 1692-8857.  https://doi.org/10.14482/eidos.30.168.

The purpose of this work is to show how Chaïm Perelman’s new rhetoric proposal fundamentally constitutes a theory of practical rationality in an argumentative perspective. To develop this thesis, we proceed as follows: first, we describe the pragmatic turn that leads Perelman to point out the limits of formal deductivist logic in the field of values, in some of his youth texts; then, Perelman’s bet on new rhetoric is presented as a kind of application of rationality, developed in his Treaty of Argumentation and in some texts written after 1958; finally, the Perelmanian notion of reason is developed in the framework of legal argumentation, to show how, from this perspective, Perelman is linked to the debate of the second half of the twentieth century known as the “doctrine of difficult cases in law”.

Keywords : Formal logic; new rhetoric; non-demonstrative discourse; argumentation; practical rationality.

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