Your assumptions can be quite insidious. You must study the actual subjects that Hubbard “spun” for you – from sources completely independent from L Ron Hubbard – so as to challenge your own assumptions, separate out Hubbard’s installed ones, and inspect them for their weaknesses.
Of all the books that have been written about Scientology, if you had only one shot to communicate to someone what Scientology was all about, I would give them John Sweeney’s “Church of Fear”.
I’ve been practicing Basic Skepticism on marauding Anti-Scientologists on the Internet. It’s pretty much unstoppable. Here’s how it works.