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That also highlights why understanding the brain is a much harder problem: CPUs are deliberately engineered so that their different functions are nicely decoupled and easy to reason about. Brains are the result of a very messy evolutionary process that never came close to optimizing for "easy reasoning for refactoring".

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Yet if a particular CPU is produced in enough quantity and is cheap enough people will engineer uses out of it that the designers never thought of, and had no intention of making possible.

It reminds me of talking to another player in an online Risk game where they didn't understand what an AI player was trying to do. The code was open source and something like only three functions, but in practice they did something completely different.

Truth. Compartmentalizing complexity is key

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