A standard result in quantum mechanics is this: if two observables are commuting then they have a classical joint distribution in every state. A converse is demonstrated here: If a classical joint distribution for the pair agrees with standard quantum facts. then the observables must commute. This has consequences for some historical and recent quantum nonlocal models: they are analyt... https://www.countryscenesaddleryandpetsuppliers.shop/product-category/horse-fly-veils/