What the measurement problem asks — why does a quantum superposition collapse to a definite state upon observation

What the Copenhagen interpretation says — the wavefunction collapse is fundamental, observation creates reality

Copenhagen interpretation: Observing a system collapses its wavefunction, shaping reality

What the Aspect experiments confirmed — Bell inequality violations prove quantum nonlocality is real

Aspect experiments demonstrated quantum entanglement's nonlocality, violating Bell's inequalities

What decoherence explains — the appearance of wavefunction collapse through interaction with the environment

Decoherence explains wavefunction collapse due to environmental interactions

What the EPR paradox challenged — Einstein argued entanglement implied either hidden variables or nonlocality

EPR paradox questioned quantum mechanics' lack of locality and determinism

What Bell's theorem proved — no local hidden variable theory can reproduce all predictions of quantum mechanics

Bell's theorem disproved local hidden variable theories' ability to match quantum mechanics' predictions

What the information paradox asks — does information falling into a black hole disappear, violating quantum mechanics

The information paradox questions: Does information vanish in black holes, contradicting quantum theory?