Paradox 3D

enit

The Penrose triangle
Static preview of the 3D scene
Off the magic angle: 0.0° Drag to rotate

Famous paradoxes in 3D

Each paradox is a 3D scene you can handle. Rotate it, play it, scroll through it, then read why your intuition got it wrong.

Paradoxes

  1. ProbabilityThe Monty Hall problemThree doors, one prize. Switching doubles your chances, and almost nobody believes it.
  2. InfinityAchilles and the tortoiseInfinitely many steps in a finite time. The fastest runner who never catches the slowest.
  3. StatisticsSimpson's paradoxA trend that holds for everyone together and for no group taken alone.
  4. RelativityThe twin paradoxLeave the same age, come home years apart.

Illusions

  1. PerceptionThe Penrose triangleThree right angles, one triangle, and a shape that cannot be built.
  2. PerceptionThe Ames roomTwo people of the same height, a giant and a dwarf. The room lies, and you believe it.

Biases

  1. StatisticsSurvivorship biasThe evidence you can see was chosen by whatever destroyed the rest.