It's amazing how many people think that Quantum Mechanic's "two states" (e.g. in the Schrödinger's cat example [1]) just mean "it's actually in one state, and we just don't know which until we look".
You don't need quantum mechanics for that. That's an ordinary cat (dead or alive) put in a box by someone else without telling you, e.g. the very classical, and intuitive "I don't know yet" thing we deal with in everyday life -- which poses absolutely no problem and no questions about the nature of the universe, the kind quantum mechanics do.
The "two states" in QM is a different beast. It's not "a box we don't know yet what's inside".
[1] Well, actually all possible states, but let's stop at the simplified 2 state cat example.
You don't need quantum mechanics for that. That's an ordinary cat (dead or alive) put in a box by someone else without telling you, e.g. the very classical, and intuitive "I don't know yet" thing we deal with in everyday life -- which poses absolutely no problem and no questions about the nature of the universe, the kind quantum mechanics do.
The "two states" in QM is a different beast. It's not "a box we don't know yet what's inside".
[1] Well, actually all possible states, but let's stop at the simplified 2 state cat example.