The Role of the Intellect in Descartes's Case for the Incorporeity of the Mind

I argue that Descartes's best known argument for dualism relies on claims about intellectual activity and not on claims about mental states generally to establish dualism. I explain that this must be so give his historical context, where arguments for the immateriality of the mind on the basis of the intellect were common. But sensation and other non-intellectual states were regarded as pertaining to the body-soul composite.