[true_religion]

Back when I studied theology, the way we used to describe omniscience was to indicate that entities that exist outside of our universe can trivially see all points of our time stream.

Thus the hypothetical devil need not reverse the hash, they just have to view its creation to know what it was created from.

[alangibson]

Anything existing outside out universe would have no access to anything happening inside it by definition. If the could access it, they would have to be part of the universe system. How else could information be transferred.