Blog: Invalidation - 2014-03-19
The two greatest crimes that can be committed with Scientology technology are the two "shuns" – evaluation and invalidation. In numerous references, LRH explicitly details the destructive effects of evaluating for a person (telling him what to think about his case) or invalidating a person's case or gains.
In fact, invalidation is so powerful that in HCO PL 25 June 72, RECOVERING STUDENTS AND PCs, LRH states that "invalidation of case or gains" is one of only four things that will cause a preclear to blow Scientology entirely. I am quite sure that if you are reading this, you have witnessed at least one example of someone leaving Scientology over this kind of invalidation.