We know the brain can be modeled by math (and therefore thought can be written down on paper).

We know because we have mathematical models for atoms. And we know the brain is made out of atoms therefore the brain is simply a mathematical model of interconnected atoms that form a specific structure called the brain.

Thusevery facet of macro (keyword) reality should be able to be written on paper and calculated. That goes for everything… from the emotions you feel to the internal forward pass of an LLM.