Descartes Raises the Possibility of the Existence of an "Evil

Multiple Choice

Descartes raises the possibility of the existence of an "evil genius" in order to demonstrate that:

A) a non-deceiving God exists.
B) he might be deceived even when he reasons that 2+3=5, or that a square has four sides.
C) he can infer his existence from the fact that he is thinking.
D) not every "genius" is morally good.
E) beliefs obtained from the senses are uncertain.