One step on the Doubt Formula, which you can do with others:
Scientology claims to increase abilities. OK, WHERE are the people made much more able by Scientology? Where are the people who have become MUCH more successful due to Scientology.
In making any investment decision (and paying over $100,000 for services is a MAJOR investment decision), one should take a look at people who have made that decision, and how well that worked out for them. You should be able to see lots of people who can truthfully say they've stably doubled their yearly income after doing their OT levels. Go look for them. Question how they increased their income, and how Scientology helped them do it.
Realize that, if Scientology could enable a hedge fund manager to guess what the market was doing even 10% more often, or a lawyer win his cases even 10% more often, or a salesman close even 10% more of his sales leads, that there would be a line of people with suitcases full of cash, stretching from the front door of Flag all the way to Tampa. And yet there isn't.
Look at staff. Ask what their case levels are. If Scientology made people more able, don't you think the FIRST people which Management would want to use it on, would be their OWN STAFF? Just innocently ask the question, why aren't more staff getting up the Bridge? Doesn't Management think that doing so would raise stats? Either Management thinks that the line that "processing increases ability" to be a fraud, or they don't want their people to be more able. It's either A or B. If A, then Management is a bunch of suppressive con men. If B, then management is just suppressive. Which is it, A or B?
Lots of opportunities to discretely sow doubts.