So which book are we talking about we must have a clear definition so that we're talking about something specific it is not our mind we can not thing out of our minds it is a boundary within our minds the boundary between what we know and what we have in still or yet thought about what is our mind what is our knowledge structure is and emergent phenomenon out of the complex mechanism which is the brain we start with initial conditions our genetic heritage we have boundary condition the environment we have in direct experience years and years spent in school and university