a process which starts the preclear from a point in the past with which he has made solid contact up through all similar incidents without verbalization. This is done over and over, each time trying to start at an earlier incident of the same kind, until the preclear extroverts on the subject of the chain. Boil-off often results wherein the preclear seems to go to sleep. Avoid boil-off for it is not therapeutic and will eventually result in reduced tone. Boil-off is a lazy auditor's excuse to be idle and facsimiles in such severe conflict that they will not resolve without resolving postulates first. Lock scanning is a standardized drill, starting on signal and ended with the preclear saying he is again in present time. It can be done on any subject. Above 2.0 (on the Tone Scale) only. —APA Glossary (app 11.7.90)