The rehabilitation of frozen Mentats consumed a long process of hypnosis, counseling, and the ultimate rebuilding of a personality strengthened to resist self-doubt. So devastating was Mental-Freeze that the condition, even if recovery was complete, was an insuperable impediment to progress to higher rank. Recuperated fifth and sixth rank Mentats were reduced to appropriate junior levels. Mentats were often haunted by fear of freezing, particularly those who labored alone, far from the protective support of the Order House or other senior Mentats. Self-doubt attacked the solitary Mentat with greater speed and force, and buyers were advised to protect their investment by abstaining from chronic criticism of their Mentats. Several cases are known of Houses trying to freeze a rival's Mentat by feeding false data to undermine his confidence in his data base.
A dangerous strategy for avoiding self-doubt was reliance on absolutes. Mentats naturally preferred known parameters to help establish the limits of inference, and absolutes could increase accuracy by reducing alternatives. Besides lending a feeling of self-assurance, absolutes appealed to Mentats as shortcuts. But the abuse of absolutes was easy and often unnoticed-hypotheses overlooked, options unexplored, fallacious inferences based on wrong assumptions. Grodon Orpar Playt III vigorously countered overdependence on absolutes through exercises in conceived reality with radical differences, e.g. a city without laws, tools designed for feet rather than hands, or a community without division of labor. Such mental gymnastics promoted an awareness of the role of unconscious assumptions and absolutes in Mentat thinking