Knowledge without “Experience”

Genia Schönbaumsfeld argues that Cartesian skepticism is an illusion induced by the “Cartesian Picture” of perceptual knowledge, in which knowledge of the “external world” depends on an inference from how things subjectively seem to one to how they actually are. To show its incoherence, she draws on the work of John McDowell, which she sees as elaborating a central theme from Wittgenstein’s On Certainty. I argue that Cartesian skepticism is not an illusion, as Schönbaumsfeld understands ‘illusion’, and that McDowell’s account of perceptual knowledge is both untenable and incompatible with Wittgenstein’s ideas about knowledge. Schönbaumsfeld thinks that, to understand how perception can engender knowledge of the world, we need a non-Cartesian account of perceptual reasons. Wittgenstein offers a much more radical break with the Cartesian Picture: an account of knowledge without ‘experience’.