The problem inherent in scientology is that item #2 and item #1 are the same. The whole of scientology would be considered disproven if only one part is disproven. Scientology as an ideology, as the various doctrines, as a church and as a therapeutic technology all exist as one inseparable unit.
How do you disprove Scientology - LOOK, don't think! It is a long, long, LONG road to nowhere. But you sure can be busy busy busy!