 and explained how they can be 1 Roberto Estrada Olguin is a Professor in the Department of Humanities at the Autonomous University of Ciudad Juárez. Adress: Av. Universidad y Av. Heroico Colegio Militar S/N Zona Chamizal C.P. 32300. Ciudad Juárez, Mexico. Email: estradaa6@hotmail.com Roberto Estrada Olguin – Bon Sens and Noûs 113 linked these two notions. If this attempt is successful, then we can show that the question of the bon sens is one of those that belongs to the three moments in time. To state as clearly as we can, according to the scholars of this kind of thought pointed out the importance of the issue that we are dealing with in the system of thought of Duhem; subsequently, I expose the link that can be established between the thought of Pierre Duhem and the tradition, in particular with the Greek thought and, more specifically, with the notion of noûs; finally indicated how we can show the transformation of the Greek notion of noûs to become the notion of bon sens, through the changes experienced by the western tradition. The Bon Sens in the Thought of Pierre Duhem Russell Niall Dickson Martin (1991, 6-13) has pointed out that to understand both the reception of the works and to understand the thinking of the historical figure Pierre Duhem, it is necessary to consider both the internal and external factors. Among the external factors mentioned the religious, the political and the philosophical context. Among the internal factors mentioned "the method of working" and "the habits of publication of Duhem" (Martin 1991, 193-199). Martin explains the work method of Duhem and asserts that he had to pay a price for the ease of writing, resulting in a single draft without notes and had to pay an even higher price by having to produce a complete form with their results in the atrocious conditions of isolation in Bordeaux and with a single opportunity to consult all the manuscripts that he wanted. "It was all done on the run with no chance to reflect", and without the opportunity to make changes that af