 Earlier, we noted another apparent problem in the Sixth Meditation passage wherein Descartes concludes that the external cause of sensation is something corporeal. One of his premises cites a great propensity to believe, yet the propensity is not itself the irresistible compulsion of clear and distinct perception. Does not the methodic procedure of the Meditations restrict Descartes to clear and distinct premises? By way of reply, distinguish (a) that my sensation has an external cause, and (b) that I have a great propensity to believe my sensation has an external cause. In context, the meditator lacks clear and distinct perception of (a). However, the relevant premise of the argument (as opposed to its conclusion) is not (a), but (b). And there is no principled reason that the meditator cannot clearly and distinctly perceive this premise.