Kafka uses Heinrich Kluever's method of equivalent stimuli to picture psycholgical reality as made up in any one moment of a pattern of stimuli and subjective equivalences. For example, if a dog jumps on a blue field after conditioned to jump on a black one, for him the two fields are subjectively equivalent. If, for the moment, I am identified with my neighbor, he is a subjective equivalent of myself. As this pattern undergoes multiple changes in time, the person possesses multiple subjective realities which may vary greatly. For example, in the treatment of a psychotic the therapist may deal with deeply regressed material during the session and later the same day participate with the patient in a matter-of-fact discussion in an All-Hospital Meeting. The therapist's ability to reject stereotyped notions about incongruity may be a potent therapeutic factor.