L'evolution des doctrines dans les Universites medievales s'est achevee aux XIVe et XVe siecles avec la predominance d'un nominalisme dont les historeins cherchent encore le sens, dans l'espoir de comprendre le passage de la pensee du Moyen Age a la pensee moderne. Paul Vignaux, professeur a l'Ecole pratique des Hautes Etudes puis a l'Institut d'Etudes medievales de l'Universite de Montreal, se propose de definir ce nominalisme sur l'exemple de son initiateur, Guillaume d'Ockham. La presente conference, consacree a la (...) theorie de la connaissance ockhamiste, restaure une exacte problematique du nominalisme dans l'histoire doctrinale du Moyen Age. (shrink)

Ce volume reunit trois textes du celebre historien francais de la philosophie medievale Paul Vignaux (1904-1987), deux textes de nature plutot autobiographique qui retracent son itineraire intellectuel et Philosophie au Moyen Age, une introduction a la philosophie medievale qui compte toujours parmi les plus stimulantes presentations de la philosophie de cette epoque. Cet ensemble de textes est complete par d'amples notices bibliographiques et une presentation de la figure intellectuelle de Paul Vignaux qui fut egalement une des (...) personnalites marquantes du syndicalisme francais. (shrink)

Ce volume reunit trois textes du celebre historien francais de la philosophie medievale Paul Vignaux (1904-1987), deux textes de nature plutot autobiographique qui retracent son itineraire intellectuel et Philosophie au Moyen Age, une introduction a la philosophie medievale qui compte toujours parmi les plus stimulantes presentations de la philosophie de cette epoque. Cet ensemble de textes est complete par d'amples notices bibliographiques et une presentation de la figure intellectuelle de Paul Vignaux qui fut egalement une des (...) personnalites marquantes du syndicalisme francais. (shrink)

Noam Chomsky and Frances Egan argue that David Marr’s computational theory of vision is not intentional, claiming that the formal scientific theory does not include description of visual content. They also argue that the theory is internalist in the sense of not describing things physically external to the perceiver. They argue that these claims hold for computational theories of vision in general. Beyond theories of vision, they argue that representational content does not figure as a topic within formal computational theories (...) in cognitive science. I demonstrate that Chomsky’s and Egan’s claims about Marr’s theory are false. Marr’s computational theory contains a mathematical theory of visual content, based on empirical psychophysical evidence. It also contains mathematical descriptions of distal physical surfaces and objects, and of their optic projection to the perceiver. Much computational research on vision contains these types of intentional and externalist components within the formal, mathematical, theories. Chomsky’s and Egan’s claims demonstrate inadequate study and understanding of Marr’s work and other research in this area. Computational theories of vision, by containing empirically based mathematical theories of visual content, to this extent present naturalizations of semantics. (shrink)

Paul Thom's book presents Kilwardby's science of logic as a body of demonstrative knowledge about inferences and their validity, about the semantics of non-modal and modal propositions, and about the logic of genus and species. This science is thoroughly intensional. It grounds the logic of inference on "that in virtue of which" the inference holds. It bases the truth conditions of propositions on relations between conceptual entities. It explains the logic of genus and species through the notion of essence. (...) Thom interprets this science as a formal logic of intensions with its own proof theory and semantics. This comprehensive reconstruction of Kilwardby's logic shows the medieval master to be one of the most interesting logicians of the thirteenth century. (shrink)