knowingly create a mental picture that is not part of the time track. In Dianetics and Scientology, the word mock-up is used to mean, in essence, something which a person makes up himself. A mock-up is more than a mental picture; it is a self-created object which exists as itself or symbolizes some object in the physical universe. The term was derived from the World War II phrase for miniature models that were constructed to symbolize weapons (airplanes, ships, artillery, etc.) or areas of attack (hills, rivers, buildings, etc.) for use in planning a battle. The term is also sometimes used in Scientology in reference to one's body. —AcademyLevelIII Glossary