International audienceAt the end of the 1980s, Tennant invented a logical system that he called " intuitionistic relevant logic " (IR, for short). Now he calls this same system " Core logic. " In Section 1, by reference to the rules of natural deduction for IR, I explain why IR is a relevant logic in a subtle way. Sections 2, 3, and 4 give three reasons to assert that IR cannot be a core logic
International audienceThis paper aims at providing a complete analysis of the intuitionistic version of the square of opposition and a reply to an article published by Mélès (Around and Beyond the Square of Opposition, ed. by J.-Y. Béziau, D. Jacquette (Studies in Universal Logic, Birkhaüser, 2012), pp. 201–218) on the same topic
In a first time, this paper shows why the classification of philosophical systems defined by Vuillemin improves our understanding of the history of philosophy. I reply in a second time to embarrassments expressed by Bouveresse and Engel about the philosophical pluralism which is, according to Vuillemin, a consequence of the principles and definitions of his classification of philosophical systems. The main thesis of this paper is a conjecture: the philosophical pluralism is not a position that one is forced to admit if one adopts Vuillemin's classification. Elements that should allow a proof of this conjecture are given in conclusion.
International audienceComme le souligne Gloria Orrigi , Quine est un penseur systématique qui n'a pas limité son activité philosophique à la seule analyse ponctuelle de problèmes singuliers – bien qu'il ait évidemment encouragé ce type de travail dans la tradition analytique –, mais il a construit un véritable système de thèses philosophiques liées les unes aux autres et pour lequel, à l'instar du système de Leibniz, il n'existe pas vraiment une voie d'accès principale ou plus fondamentale que les autres. C'est un bâtiment où les quartiers communiquent entre eux. On jugera ici de la solidité de l'édifice par la simple exposition de sa structure. On soulignera les thèses les plus fortes qui sont comme l'armature du navire (selon une comparai-son chère à Quine). Je propose donc ici à la fois une invitation à découvrir les questions soulevées par Quine et un exposé des résultats de sa philosophie
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