Bell's theorem and the different concepts of locality

Four definitions of the principle of local causes, each of which, when applied to a theory, leads to a different mathematical property of the theoretical predictions, are considered and physical justifications given. The predictions of quantum theory are shown to contradict three of those four concepts of locality. Conclusions are drawn about the physical process and about the interpretations of quantum theory or any other theory that would provide the same predictions. Several interpretations are still possible