According to Bell's inequality, a physical theory must be local and contain elements of reality to explain quantum behavior.
The CHSH inequality is a practical way to test violations of local realism.
Quantum experiments can violate the CHSH inequality, demonstrating the violation of local realism and the influence of measurement choices between observers.
Quantum computer simulators can be used to test and confirm the violation of the CHSH inequality, supporting the predictions of quantum mechanics.