creates mind and then the mind can exert power on the brain and physically exert structure on the brain. >> can a poor learning brain have a good mind? >> thomas edison did terrible in school, got beaten in school, and we would say he had an amazing mind. >> larry: how do we separate them, let's say on obesity. >> the mind-body dualism goes too far back. millions and millions of years went into our brain development and we develop in such a way to maybe live maybe to the age of 20 that will increase our probability of surviving, things that we crave and are deeply rewarded in our brain system. i don't want to get too heady on your guys. the brain has many different systems there's a rash system, an emotional system and the system gets very -- and that can trigger an addictive process.