If any patient is capable of making a system map, it discredits the diagnosis. It may be that the therapist is trying to prove that the patient is dissembling! It means that the patient is in control of which alters present themselves. True dissociative patients are not in control and have no idea of the dissociated personalities, in most cases. Only when a trained mental health professional helps break down some of the amnesic barriers do patients start to know the alters. Obviously there are exceptions to this but this is true for most dissociative patients. At least from what I have read in Dr. Ross's book.