Descartes endorses the two prima facie inconsistent claims that sensory ideas are innate (Claim A) and caused in us by bodies (Claim B). Most scholars believe that Claims A and B can be reconciled by appealing to the notion of occasional or triggering causation. I claim that this notion does not solve the theoretical problems it is introduced to solve and it generates additional difficulties. I argue that these difficulties result from conflating two questions that need to be kept distinct while inquiring about the origin of ideas: the psychological question of the mechanisms by which we acquire ideas and the metaphysical question of how the content of these ideas is determined. I conclude by proposing a new way of reconciling Descartes's Claims A and B in light of this distinction. On my account, Descartes's very views on innateness explain why bodily states must be causes of sensory ideas. 1 Tad Schmaltz, for example, in Schmaltz (1997), 33, writes that none of the claims Descartes makes regarding sensations is more bewildering than his claim that sensations are innate. I will be assuming throughout the paper that Descartes held a representationalist view of sensation, according to which sensations of color represent-although obscurely and confusedly-material objects. This explains why I will be using "sensations" and "sensory ideas" interchangeably. For a defense of a representationalist reading of Cartesian sensations see