The Quantum Theory and the Observer

When an observer sees something, that's when you start asking questions about would a rabbit do and so on. Well as I said, all the possible answers are ruled out either by logic or by physics or by experiment. The whole theory doesn't make sense. It doesn't in fact happen because when you observe something like the outcome of an experiment where the photon lands on the screen, there are other copies of you watching it. And this add-on that says only one of them happens never happens.