Although Descartes believed that everything in the world may be called into question, including the existence of his body and the external world, he believed that the simple affirmation ________ must be true each time it is said or thought.
A. All will pass away
B. Everything is illusion
C. God exists
D. I exist
Question 2
According to Aristotle's Four Causes, the efficient cause is _______.
A. the matter of which a thing is made.
B. the embedded form that gives shape and purpose to the matter.
C. the triggering action that sets the thing in motion.
D. the ultimate purpose for which a thing exists.
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