Then it’s not an approximation - it’s the reality. The question is whether all things the universe does can also a computer do in theory. If one thing about the universe is uncomputable, then the entire universe is uncomputable.
The paper suggests this thing is quantum gravity. I have my doubts about it, but I’m in no position to refute the paper.
Can the universe not also approximate? Why must it be an exact result whenever a rule is applied?
Then it’s not an approximation - it’s the reality. The question is whether all things the universe does can also a computer do in theory. If one thing about the universe is uncomputable, then the entire universe is uncomputable.
The paper suggests this thing is quantum gravity. I have my doubts about it, but I’m in no position to refute the paper.