Hi, The violation of Bell's inequality says that quantum mechanics can't be both local and realistic. Let's assume it is realistic but non-local. How does this explain the fact that a single particle can be in a superposition that collapses to a particular state when measured? Since we only consider a single particle at a single location I can't see how non-locality could be useful here. To put it differently, I don't quite understand what the violation of Bell's inequality implies (if anything) if we don't look at entangled states.