ABSTRACT
The article aims to show the meaning of the notion of "transcendental" inside the reconstructive method of Jürgen Habermas. For such, first of all, it attempts to present the difference between the transcendental argumentation as anti-skeptical argumentation and the transcendental proof in Kant and, then, the difference between Habermas and Apel about the possibility of an ultimate foundation of communicative rationality. According to my interpretation, there are reasons of logical order for the refusal of the ultimate foundation in Habermas, but also reasons related to the historicity of understanding of reason.
Keywords:
Reconstruction; transcendental argument; Critical Theory; communicative rationality; discourse ethics