[neilh23]

I always liked the quantum bogo-sort algorithm:

1) Randomise list

2) if list not in correct order, destroy the universe

The universe that's left will have the correct answer.

[leni536]

Note that the random source should be truly (in quantum sense) random for this to work.

[wickawic]

"Help, I used a PRNG and I accidentally destroyed all known universes"

[Roodgorf]

Better check StackOverflow.