Quanta Magazine traces how a series of theorems squeezed Einstein's hope that particles have definite properties. Bell's theorem showed that a world both real and local cannot reproduce quantum predictions, and experiments side with quantum mechanics. In 2012 the PBR theorem added that treating the quantum state as mere knowledge also clashes with an objective world, a result since confirmed on quantum hardware.

That leaves physicists with a hard choice: accept a strange objective reality, or give up objective reality altogether. Some researchers are now testing looser definitions that still feel intuitive. For freethinkers the piece shows how careful reasoning and experiment, not intuition or authority, decide what we may claim to know.

Source: Charlie Wood, Quanta Magazine (2026-11-06)

Summarised by the FTI newsdesk.