If, instead of a cat, the professor put in one of his grad students, would the grad student be in a quantum state? And if it was another grad student who had the job of opening the box, and the poison in the box would have killed him too, would HE be in an indeterminate state until the professor opened the door to the lab?
More importantly, is the student in a safe space?
Yes except these are just thought experiments, I don’t know that there can be a quantum cat or person, all this really takes place with elemental particles.
The cat is not really in a quantum state, but it’s life is subject to the quantumn state of the decaying subatomic particles.
Not clear.