 Doubtlessly, such a generalization can only be taken so far; for Descartes too wanted to “replace the speculative philosophy taught in the schools” with a “practical philosophy” that would employ his method even in an applied science like medicine, whose primary goal was to maintain the health of the body: “the chief good and the foundation of all the other goods in life” (1637 [PWD: 142–143]). Most importantly was (1) their equal concern with formulating a method that would allow them to arrive at knowledge of the world, and (2) the constructive aspect of their respective scepticism, which in both cases was a starting point. And though it seems by all accounts that Descartes integrated Sanches’ autobiographical narrative into the Discourse on the Method, without due attribution, their projects were quite different: one epistemologically based on sense perception, the other metaphysically based on internal (a priori) first principles. Ironically, it has been argued that Descartes turned “first philosophy” into epistemology.