+Hidden variables are hypothetical properties of reality, unobservable and yet believed by some to predetermine the outcomes of quantum events, thus challenging the inherent randomness of [Quantum Mechanics](/wiki/quantum_mechanics). Proponents suggest that if these deeper, unmeasured factors, often linked to concepts like [Local Realism](/wiki/local_realism), were known, the probabilistic nature of quantum theory would resolve into classical determinism.
+## See also
+- [Bell's Theorem](/wiki/bell%27s_theorem)
+- [Determinism](/wiki/determinism)
+- [Quantum Entanglement](/wiki/quantum_entanglement)