> You'd need to know where pretty much every ion was and it's momentum, and I'm pretty sure that's impossible. As parent said, people do stuff like trans-crani

> You'd need to know where pretty much every ion was and it's momentum, and I'm pretty sure that's impossible. As parent said, people do stuff like trans-cranial electric stimulation which surely changes where some ions are, yet they do not lose their personality afterwards. I'm pretty sure our brain is more robust than the exact position of every ion. Biology is very messy, and stochastic. Also note how artificial neural networks are very noise resistant, which allows people to run them on low-precission numbers.