Descartes deepens his doubts at the end of Meditation I by supposing he is being deceived by __________.

Question

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Descartes introduces the concept of an "evil genius" (sometimes referred to as an "evil demon") at the end of Meditation I as a powerful being who is capable of deceiving him about the nature of reality, including the existence of the external world and the truths of mathematics. This hypothetical scenario is used to deepen his doubts and justify his method of radical skepticism.

Descartes Deepens His Doubts at the End of Meditation I