In my opinion Denetts's theory that the person is their brain is valid. First off, in a literal sense your brain is controlled by your brain. Then take a minute and think a little deeper, all the thoughts we have or any memories about our lives is because of our brain. It processes our emotions and helps us to learn and grow; our brain is what shapes our identity. Denett found that when he was re-embodied there was a duplicate brain, essentially a clone. It's name was Hubert and he was a computer, a computer that was able to function as Denett's actual brain. There could've been two Denett's in the world or a "back up." At that moment Dennett had a realization, "My strongest intuition was that in such an eventuality I would survive so long either brain-body