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How do you know you’re not dreaming? - Daniel Gregory

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TEDEd Animation

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Bizarre things happen in dreams: you fly, or conjure an all-you-can-eat buffet out of thin air, or get chased by witches through the halls of your school. But the strange things that happen in dreams don’t seem strange at the time. So, how do you know you’re not in a dream right now? Is there a way to prove that you're awake? Daniel Gregory digs into the philosophical theories of wakefulness.

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TED-Ed Animations feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TED-Ed Animation? Nominate yourself here »

Meet The Creators

  • Educator Daniel Gregory
  • Director Daniel Stankler
  • Narrator Addison Anderson
  • Storyboard Artist Daniel Stankler
  • Animator Daniel Stankler
  • Sound Designer Zing Audio
  • Composer Zing Audio
  • Director of Production Gerta Xhelo
  • Editorial Director Alex Rosenthal
  • Producer Bethany Cutmore-Scott
  • Editorial Producer Elizabeth Cox

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