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AI is just a technological program that is instructed to perform humans activities either in or absence of humans aid.
No one knows how Satoshi Nakamoto coded the program of bitcoin and believing it blockchain is built on the highily system of impeding any ratio of breakdown with the attempts of manipulations.
Isn't the code available under an open MIT license?
You're right. Bitcoin Core always use MIT license, even back when it's initially created by Satoshi. In addition, Bitcoin Core isn't the only full node software out there which is further proof that other people can understand Bitcoin protocol.