In 1964, John Bell turned Einstein's EPR paradox into a testable ❓question. By 2015, loophole-free experiments, including one using electron spins 1.3 km apart in Delft, showed no local hidden variable theory can explain entanglement. 🤔
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The EPR paradox: Einstein's quantum mistake | Psyll
The EPR paradox explained: Einstein's challenge to quantum mechanics, Bell's theorem, and what entanglement reveals about the true nature of physical reality.