View full lesson: http://ed.ted.com/lessons/how-do-you-...
How do you know you’re real?
Is existence all just a big dream?
Has some mad scientist duped us into simply believing that we exist?
James Zucker investigates all of these questions (and more) in this mind-boggling tribute to René Descartes’s "Meditations on First Philosophy." Lesson by James Zucker, animation by Stretch Films, Inc.
https://youtu.be/LmxlcJFTaYU