PHIL101 - Introduction to Philosophy forum Week 3 Descartes, Rationalism, and Philosophy

Please pick one of the following questions to answer for the forum this week: Why doesn’t Descartes simply determine what's real by looking around him and use his sense experience? In Meditation II, Descartes states, "I am; I exist - this is certain." Explain why Descartes claims that his knowledge here about this cannot be doubted? What is the nature of the "I" for Descartes and why doesn't it refer to the physical body of Descartes?