Comment by Gooblebrai

> You have them because some signals come in from your nerves, which your brain turns into a world model. You are effectively a "brain in a vat", the vat just happens to be placed on top of your body

I think we give too much credit to the brain. The gut has almost as many neurons as a dog's brain and the heart has neurons too. "You" are more likely the whole ecosystem, not just your brain. There are even some hypothesis of disorders like depression being more influenced by the gut than the brain.