Abstract
Descartes' First Meditation is widely supposed to contain an intuitive and compelling argument in support of skepticism with respect to the existence of a natural world. The leading question of this essay is whether that is indeed the case. To this end, I undertake a detailed rereading of Descartes' text on its own terms, abstracting from what has been made of it during subsequent centuries. I conclude that the argument in fact to be found in the First Meditation rests upon a series of problematic and disputable commitments - a classical formalist paradigm in epistemology, according to which, explicitly or implicitly, mathematical knowledge is treated as a model for knowledge in general; a broad notion of "reasons for doubt" which subsumes mere possibilities; and, most contentiously of all, the presumed ontological independence of mind and body