.In this paper, I address Descartes’ claims that sensory perceptions function to aid and preserve the subject in interacting with the world, and focus specifically on the ‘valence’, or agreeable/disagreeable quality, that characterizes many sensations. I show how Descartes considers this aspect of sensation to be a significant factor in the ecological role of sensory perception and I then turn to a kind of case that seems to pose a problem for this view: that of aesthetic pleasure. I consider Descartes’ (...) remarks on a particular kind of aesthetic pleasure – that found in musical consonance – and argue that his discussion of this phenomenon reveals that he distinguishes between two distinct kinds of valence – evaluative sensory valence and aesthetic valence – only one of which functions to report directly on ecological evaluation. Further, I suggest that the best way to understand the distinction between these is by appealing to Descartes’ three grades of sensory perception. (shrink)

Inspired by Bermúdez’s notion of proto-logic, I would like to fathom what the true proto-logic could be like. But this will be approached only in a negative way of figuring out what it could not be. I shall argue that it could not be purely deductive by exploiting the recent researches in logic of maps. This will allow us to reorient the search for proto-logic, starting with animal abduction. I will also suggest that proto-logic won’t get off the ground without (...) proto-geometry. These negative results will shed some lights on some further conceptual and historical issues around the language of thought hypothesis to arrive at the true proto-logic. (shrink)

Descartes analysed the mind into various faculties or powers, including pure intellect, imagination, senses, and will. This article focuses on his account of the sensory power, in relation to its Aristotelian background. Descartes accepted from the Aristotelians that the senses serve to preserve the body by detecting benefits and harms. He rejected the scholastic Aristotelian sensory ontology of resembling species, or ‘forms without matter’. For the visual sense, Descartes offered a mechanistic ontology and a partially mechanized account of sensory processes, (...) including some previously ascribed to judgement. He did this in the context of his theory of brain signs that prompt sensations. The article contends that Descartes’s use of the sign-relation was modelled on standard discussions of non-resembling signs in commentaries on Aristotle’s De interpretatione. It follows three uses of the sign-relation: brain states that cause colour sensations; brain states that cause experiences of spatialized contents, such as shapes; and brain states that realize a ‘natural geometry’. It argues that Descartes’s natural geometry does not involve mental operations but physiological mechanisms that co-vary with the distance to seen objects. While retaining the language of sensory powers, Descartes offered a partial mechanization of those powers. (shrink)

Cet article a pour objet la réinterprétation, dans le sillage de la rénovation keplérienne de l’optique, de la fonction de l’image rétinienne pour la vision par Gassendi et Descartes. Une comparaison de leurs approches montre qu’elles reposent sur une interprétation différente du modèle iconique de la perception. S’ils attribuent un rôle crucial à l’imagination pour la perception visuelle, leurs positions philosophiques font jouer un rôle différent à l’image dans la perception visuelle et les amènent à concevoir de façon divergente l’imagination (...) et son rapport aux autres pouvoirs de l’esprit. (shrink)