What physical event actually takes place in Rationalism and the Cartesian Doubt? How is reality different from what they experience? What does Descartes say about what we perceive and believe is happening? How do our experiences relate to Descartes' reasons for doubt? What does Descartes say for a belief to be knowledge? According to Descartes, do our beliefs count as knowledge? Offer another example of our senses that seem to fail us, leading to a false belief or impression of reality.