Sorry for the dumb question... that's similar to another one just posted, but that other question was about many worlds. Without resorting to many worlds... ... if I'm an observer outside the box and I cause the collapse of the wavefunction by measuring something, shouldn't the cat do the same inside the box? I mean, a cat is pretty big, so shouldn't it be an observer too? If there is a dead+alive cat in the box before the box is opened, shouldn't I be just as dead+alive if I were the cat in the box? So if I was inside the box in a superposition of states, would I be able to detect that? What if I put a rat inside the box, instead of a cat? or a virus? or protein? or a single atom?