| m0ney said: There is no evidence because we are living in a bubble. Imagine if a video game character stepped out of the game into our world where laws are completely different. |
I don't think that the usual ideas of simulating things work well with the Mathematical Universe Theory. You can calculate that 1 + 1 is 2, but what does it mean to simulate the fact that 1 + 1 is 2?
You are correct that it's entirely possible that there is another layer, possibly even infinite supersets of what we know of as Mathematics that we have no possibility of examining because it just doesn't work here.
For what it's worth, Plato discussed whether Mathematics was real and/or different to the real world, and if it was invariant in time. Max Tegmark did work trying to show that the Universe does exactly what static Mathematics tells it to. Lots of people have theorised why Mathematics exists and works at all. I personally like the approach of "mathematics can't not exist, and that's why we're here".
