People who don't know they are not dead are interesting to me, because as we know there are people that don't know they are dead - they are the known unknowing deads. There are also people we know that are the knowing undead; that is to say the people we know who know that they're not dead. There are also the unknown unknowing dead; that is to say those that do not know they are dead that we don't know about. But there are also the unknown unknowing undead - the ones we don't know who don't know that they are not dead.