complete lists of further problems

Hyperbolic doubt means having the tendency to doubt, since it is an extreme or exaggerated form of doubt. Knowledge in the Cartesian sense means to know something beyond not merely all reasonable doubt, but all possible doubt. In his Meditations on First Philosophy (1641), Descartes resolved to systematically doubt that any of his beliefs were true, in order to build, from the ground up, a belief system consisting of only certainly true beliefs;