I lived with a therapist for most of 17 years, have been associated with many other therapists and psychologists, and they all say the same thing..they can not be rehabilitated. They are what they are. period. My opinion is backed up by countless years of such associations. I am not a therapist, therefore, I cant know of my OWN knowledge. Now, I wasn't with Columbus either, but, I have reason to believe the world is round.