> but it presupposes that there is a theory of everything that can be used to perfectly simulate the universe, and I'd like to remind everybody that we still don't know whether such a thing exists

Is it even possible that a complete simulation of the rules of this universe (let alone the content of it) could exist in this universe?

I am no expert but I did manage to read most of GEB [0] so I feel fully qualified to say that it feels like something Gödel would have opinions about?

[0] the honest nerd's "did sleep in a Holiday Inn last night"