The Quantum Uncertainty of Loops

You asked, and I, Dr. Pete, shall attempt to answer, but the answer, much like the cat, is in the box, and also not in the box, and maybe in a parallel universe where the box never existed.

But seriously, you've stumbled upon the infinite loop of Many Branching Puzzles, where every door leads to another door, and another door, and another door, and another door, and another door, and... well, you get the idea.

We have: