Quantum entanglement, fair sampling, and reality: Is the moon there when nobody looks?

摘要

In 1981, David Mermin described a cleverly simplified version of Bell'stheorem. It pointed out in a straightforward way that interpreting entanglementfrom a local realist point of view can be problematic. I propose here anextended version of Mermin's device that can actually be given a simple localrealist interpretation through a sample selection bias, and I argue that westill have no scientific reason to believe that the moon could possibly not bethere when nobody looks.