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quote: Interpretation of Quantum Mechanics:Quantum mechanics is a physical theory which is extremely non-intuitive. The equations have been very successful in predicting experimental results, but there have been a wide range of interpretations of what those equations mean. The need for a large range of interpretations of quantum mechanics becomes clearer once it is mathematically demonstrated that no quantum theory can have all of the properties one would like quantum mechanics to have. One inituitively would like a theory of quantum mechanics - that is complete and not requiring any outside theory - that is local in that the events at one point are only effected by nearby areas - that is deterministic which is that given one set of circumstances, there is only one possible outcome - that has no hidden variables - that predicts only one universe However, Bell's theorem appears to prevent quantum mechanics from having all of these properties. Which property is removed results in different interpretations of quantum mechanics.