eli5 a theory about simulation theory is that mathematics is just the code of our universe, how does math work like code for the universe aside from simulation theory?

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Not sure exactly what you’re asking but IMO…

Self-conscious neurology is what’s behind the mathematics of your experience of consciousness

Math is a language to explain the universe, not dictate it.

It follows strict syntax and semantics. Sometimes from one or multiple syntactically and semantically correct statements that are true, we can derive other syntactically and semantically correct statements that must be true by the logic of the language.

It’s like in english when you see that it’s raining, you can say that A: it’s raining, and B: The road becomes wet. It is now proven that from A follows B or short A->B, but that does not mean that only because the road is wet that it must’ve been raining. Could’ve been a pissing cow. But what we can definetely derive from it is: If the road is not wet, it definetely wasn’t raining. From not B follows not A, or short !B->!A. This logic is fundamental and only one of many examples of how math helps us to understand the interior architecture of our universe, but it’s most certainly not programming it.

There are lots of different philosophical views about what exactly maths is, how it works, how it should work, etc. But “simulation theory” isn’t really taken very seriously outside IT circles, so I’m not sure anyone has spent too much time thinking about what the implications would be for maths if it were true.

It’s important to bear in mind that maths is mostly made up of rigorously defined axiomatic systems and things that can be proved deductively from those axioms. The nature of our universe might have a big influence on which axiomatic systems and results we’re interested in, but it shouldn’t have any impact on what results are true in a given axiomatic system.

What do you mean exactly? Math is a way of describing phenomenon, similarly to how we can use language to describe it. We can observe phenomena and apply numbers to them by counting or measuring. Because numbers have certain relationships, we can use those relationships to do math and make predictions.