Originally, Descartes found it possible to doubt something as obvious as 2 + 3 = 5. But now he embraces the more complex and controversial metaphysical principle that “there must be at least as much...

Originally, Descartes found it possible to doubt something as obvious as 2 + 3 = 5. But now he embraces the more complex and controversial metaphysical principle that “there must be at least as much in the efficient and total cause as in the effect,” claiming that the “light of nature” makes this principle evident to us. How certain are you of this principle? Why do you have this degree of certainty about it? Do you agree or disagree with Descartes that it is impossible to doubt this principle? Why?