Sure you can. You know can see whether you are alive or not, therefore you collapse the wave function. You don´t start existing in a state of flux everytime you are alone, do you=
No, the cat cannot possibly count as an observer. Drie, notethat this is only an analogy to the behavior of particles. The cat ....FINE. it IS an observer, but a different one. But it cannot possibly give US information. Relative to US the cat is both dead and alive. If we could ask the cat, then it is no longer superposition because we observed the cat. I don't think that things are actually superimposed, are they (PLEASE CORRECT ME IF IM WRONG), its just a concept. This is (superposition) is the concept behind quantum computing. Ever heard of Quantum Entanglement? Amazingly enough, its as if the cat COULD tell us if it was dead, alive, or what position it was between dead and alive. Cool? yes! tl;dr: No. Funny thing is that, I tihnk I just understood what I typed. Oh wait no Feynman says I dont >.>
Ya, not that bad. And common sense is different, because some people use different logics to justify their opinion.