ABSTRACfObjective local theories of reality are defined, and shown to lead to predictions which are distinctly different from the predictions by quanttnn mechanics.Experiments may thus be performed which will either disprove the predictions by quanttnn mechanics in at least one application, or show that nature cannot be viewed as both objective and consistent with macrocausality.The experimental requirements are presented.The demonstration is done through a generalization of analyses by Bell, Clauser, Horne, Shimony, and Holt.The present analysis will be based solely on the phenomenology of correlation experiments, and thus will constrain the most general theories of this type.