Extensive experimental tests of Bell's theorem and quantum nonlocality consistently violate Bell inequalities, refuting the hypothesis that quantum mechanical randomness is governed by local hidden variables.
Bell's theorem and subsequent loophole-free experimental tests (such as violations of Bell and Hardy inequalities) have consistently demonstrated that quantum mechanics is incompatible with local hidden variable theories. While a minority of papers discuss alternative formulations like contextuality or measurement-dependence (e.g., papers [1], [4], [7]), standard local realism is overwhelmingly refuted by decisive experimental evidence.