100 Profound Philosophical Thought Experiments That Will Keep You Up Thinking

In this Sleep or Think session, we invite you to spend 3 quiet hours with 100 profound philosophical thought experiments, not as puzzles to be solved in a hurry, but as quiet doorways into the questions humanity has never stopped asking. From standing beside the lever of a runaway trolley to wondering whether you are only a brain in a vat, from rebuilding the Ship of Theseus plank by plank to stepping into a machine that offers perfect happiness, each idea unfolds gently and clearly. Let these ideas reshape how you see identity, morality, and the nature of reality — perfect for late-night reflection, deep thought, or simply to fall asleep to the soft rhythm of thoughtful narration. At Sleep or Think, we're building a quiet space for curious minds — a place to learn, grow, and rest while exploring the deepest questions philosophy has ever asked. If you find comfort here, consider joining us. 🕰️ Time Stamps: 0:00 The Trolley Problem 2:08 Brain in a Vat 4:12 The Ship of Theseus 6:04 Schrödinger's Cat 7:57 The Experience Machine 9:58 Plato's Cave 11:54 The Teleporter Paradox 13:49 The Chinese Room 15:35 Mary's Room 17:16 Descartes' Evil Demon 19:25 The Simulation Argument 21:09 The Veil of Ignorance 22:56 Philosophical Zombies 24:47 The Grandfather Paradox 26:34 Newcomb's Paradox 28:26 The Ring of Gyges 30:11 Swampman 32:03 Quantum Suicide 33:51 Roko's Basilisk 35:32 The City of Omelas 37:26 Laplace's Demon 39:16 Boltzmann Brains 41:00 The Utility Monster 42:37 Pascal's Wager 44:41 The Drowning Child 46:31 The Violinist 48:21 Zhuangzi's Butterfly Dream 50:25 Achilles and the Tortoise 52:16 The Infinite Monkey Theorem 54:08 Hilbert's Hotel 56:01 The Transplant Surgeon 57:49 The Fat Man Variant 59:40 Buridan's Ass 1:01:30 Nagel's Bat 1:03:25 The Paperclip Maximizer 1:05:32 The Twin Paradox 1:07:18 Einstein's Light Beam 1:09:15 Maxwell's Demon 1:10:42 Twin Earth 1:12:44 The Inverted Spectrum 1:14:32 The Eternal Recurrence 1:16:13 The Prisoner's Dilemma 1:18:06 The Lifeboat Dilemma 1:20:04 Wigner's Friend 1:21:59 The Floating Man 1:24:01 Pascal's Mugging 1:26:07 The Ticking Time Bomb 1:27:50 The Sorites Paradox 1:29:40 The Monty Hall Problem 1:31:27 The Sleeping Beauty Problem 1:33:20 The Doomsday Argument 1:35:18 Russell's Teapot 1:37:15 The Omnipotence Paradox 1:39:20 The Euthyphro Dilemma 1:41:16 The Liar Paradox 1:43:15 The Barber Paradox 1:45:07 The Surprise Examination 1:46:59 The Repugnant Conclusion 1:48:55 The Survival Lottery 1:50:57 Brain Fission 1:52:47 Gradual Neuron Replacement 1:54:36 Fading Qualia 1:56:38 The China Brain 1:58:30 Wittgenstein's Beetle 2:00:17 Molyneux's Problem 2:02:07 Einstein's Elevator 2:04:01 Galileo's Falling Bodies 2:05:53 Newton's Bucket 2:07:57 Heisenberg's Microscope 2:09:56 The Last Man 2:11:50 If a Tree Falls 2:13:45 The Stopped Clock 2:15:28 Gettier Cases 2:17:06 Frankfurt Cases 2:18:54 Kant's Axe Murderer 2:21:00 Kavka's Toxin Puzzle 2:22:52 Parfit's Hitchhiker 2:24:51 The Non-Identity Problem 2:26:37 The Tragedy of the Commons 2:28:34 The State of Nature 2:30:29 The Invisible Gardener 2:32:30 The Two Envelopes Problem 2:34:21 The St. Petersburg Paradox 2:36:23 The Grue Paradox 2:38:20 The Raven Paradox 2:40:02 The Lottery Paradox 2:41:52 The Preface Paradox 2:43:30 Olbers' Paradox 2:45:24 Inverted Earth 2:47:25 Kripke's Quus 2:49:29 Locke's Locked Room 2:51:27 The Missing Shade of Blue 2:53:27 Descartes' Wax 2:55:29 Neurath's Boat 2:57:30 Leibniz's Mill 2:59:00 Plato's Chariot 3:01:02 Incongruent Counterparts 3:02:40 The Blind Men's Elephant 3:04:39 Galileo's Ship 3:06:40 Zeno's Arrow