The Ship of Theseus thought experiment is a long-standing problem in philosophy that has been debated for centuries. This philosophical debate has been brought back into public discourse by the rise ...

Here’s a thought experiment. You’re a pediatrician. A child walks into your consulting room accompanied by a concerned mother. You do tests, you observe. Fairly quickly you arrive at a diagnosis.

Physicists are fond of Gedankenexperimente—thought experiments that are difficult or impossible to perform in the real world. Schrödinger’s cat is a well-known example of a thought experiment, used to ...

The faster you move, the stranger time becomes. By imagining how light travels to two people moving at different speeds, Einstein showed that time isn’t absolute. His thought experiment revealed that ...