Your book. >> yes. >> and in my mind, i immediately went to the fact that there are far more julies and chess players where there are affluen more julie and chess players in affluent communities. this increasing focus on resources and access to opportunity and opportunity to become more intelligent, i'm wondering how much of this is a training issue if the poor can't afford those things and have to be more creative, where the rich have these types of things at their disposal. are there other things people with less resources can do to brain train as well? >> there absolutely are. anyone can pl...