Descartes claimed he was totally sure that he existed because
A) God, being all good, would not allow an evil demon to deceive him.
B) God, being all good, would not allow an evil demon to exist.
C) even if his life is a dream, he must nevertheless exist in order to have the dream.
D) the difference between living and dreaming is indubitable.

Question

Quizplus · Accepted Answer

Descartes argued that even if his experiences were being manipulated by an evil demon or if his existence was just a dream, the fact that he was able to doubt his own existence proved that he must exist as a thinking entity. Therefore, he concluded that his own existence was the only thing that he could be absolutely certain of.

Descartes Claimed He Was Totally Sure That He Existed Because