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Quantum Computers Can't Solve the Stopping Problem, Right?
BQP is basically, you know, well, it's contained in like P with the magic power to solve Sharp P problems. What was BQP contained in P space? Oh, that's an excellent question. So anything you can do with a quantum computer, I could simulate with a classical computer, if I only have exponentially more time. It's enough to show that quantum computers could not solve the halting problem,. They could never do anything that is literally uncomputable in any sense.