A black box with two input bits and two output bits is called a non-local PRbox, if the XOR of the output bits equals the AND of the input bits. In arecent article, Cerf et al. show that Alice and Bob, using such a PR box, caneffectively simulate entanglement without the need of communication. We showthat an adaptation of a model due to Dirk Aerts, yields a realistic simulationof the non-local PR box without communication. Because the model is entirelyrealistic, it cannot violate relativistic constraints. Like a non-local box, itcan be used to simulate the singlet state coincidence probabilities, but thetime to complete the observation of the outcome will exceed the time it takes aphoton to travel one arm in an EPRB setup. The model explicitly shows how toproduce an outcome that is locally perfectly random, but neverthelessdetermines what happens in the other wing of the experiment, withoutcommunication taking place between the two wings. In this sense, it can serveas an accurate metaphor for the mechanism of entanglement. The modelconsiderably strengthens the claim that no communication is necessary tosimulate entanglement.
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