Nugget & Paul: Excellent adages.
SAB: The Witnesses have buzz terms called "Accurate Knowledge", "Thinking Ability" and "Discernment." Those who chose to remain could use the above sentences to back up their decision to stay.
The dubs in my life always seemed to equate the term critical thinking with independent thinking - a no-no for "True Christians". In fact, every time I've mentioned "critical thinking" to a JW family member, he or she acted like I broke a 10 second stink-biscuit.
Recently I had my JW brother tell me that if 'he kept talking to me, I might cause him to start using critical thinking, too.' GASP! Why would he say that if he didn't perceive it as being a negative thing?