[notshift]

A large amount of computation takes place in the gut, largely by the foreign bacteria that make up our gut flora, and the gut has direct lines of two-way communication with the brain. Hence the term "gut feeling".

The brain certainly does a lot of heavy lifting, but I think if you took a person's brain out of their human body and into a robot body instead, they'd probably have dramatic shifts in personality, behavior, thought processes, feelings, worldview, etc. It would probably be on a similar level as those experiments where people use magnetic or electric pulses on their brain or whatever and observe large personality changes.