Cogito ergo sum means "I think, therefore I am." That quote—coined by French philosopher René Descartes—is the cornerstone of modern philosophy. What it means is that although you could be wrong about nearly everything, from the answers to simple math problems to the very belief that you're awake and not dreaming, the one thing that you can be certain of is that you're experiencing the things that you're experiencing. But according to modern-day philosopher Daniel Dennett, even that is suspect.
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Written by Reuben Westmaas April 14, 2017
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