The influential French philosopher Rene Descartes famously said, "I think, therefore I am," revealing that he:

Question

Quizplus · Accepted Answer

Descartes believed that the only thing he could know for certain was that he was doubting, and therefore thinking. From this, he concluded that he must exist as a thinking thing, even if everything else he perceived in the physical world could be doubted or deceived. Therefore, he could doubt the existence of the physical world, but not the existence of his own mind or consciousness. This position is known as Cartesian dualism, which separates the mind and body as distinct entities.

The Influential French Philosopher Rene Descartes Famously Said, "I Think