Which of the following statements would Descartes agree with? (select all that apply)
A. The only thing that I know, is that I know nothing.
B. Certainty and Knowledge are found in my sensory experiences
C. I cannot Know for Certain that anyone or anything in the external world actually exists
D. I cannot doubt that I am thinking
E. The only thing I know for sure is that humans exist since they are thinking
F. I Know for Certain that God exists, because I can imagine God, and anything I can imagine must exist.