Descartes' "evil genius" could make Descartes doubt everything EXCEPT
A) the fact that God exists.
B) the fact that he is doubting.
C) the fact that he is sleeping.
D) the fact that he is a human being.

Question

Quizplus · Accepted Answer

Descartes argued that while the "evil genius" could deceive him about the existence of the external world, his own existence, or the truth of mathematics, the very act of doubting these things proved that he, as a thinking entity, must exist. This is encapsulated in his famous dictum "Cogito, ergo sum" ("I think, therefore I am").

Descartes' "Evil Genius" Could Make Descartes Doubt Everything EXCEPT