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Mathematics disproves Matrix theory, says reality isn’t simulation
(interestingengineering.com)
This is a most excellent place for technology news and articles.
We are reasonably confident that mathematical limitations apply to both the inner and outer universe. However they don't understand the mathematical limitations enough to understand how little they matter. Pi is pi everywhere - that doesn't change anything.
There are truths we can't prove true - again it doesn't say anything about all the other trues we can prove.
Funny that your example is wrong. Pi isn't always 3.14, it's only 3.14 in euclidian worlds. We are not even sure ours is one