Einstein reminded the group, Heisenberg and Born had claimed that quantum physics was closed, complete, perfect as it was. In that case, there cannot be anything that determines the particular location at which the electron hits the film. But this is a problem—and not because it introduces randomness into nature. Instead, the problem is one of locality: the principle that something that happens in one location can’t instantly influence an event that happens somewhere else.
When they gave up. Einstein took the initiative
