Critical thinking is a manner of thinking that allows for critique of ideas using reason and logic. It's an objective, unbiased approach to evaluation of ideas and situations. The PFAL series, along with Renewed Mind and Dealing With The Adversary, taught us to explicitly avoid and deny critical thinking........... "Having done all, STAND!. You just don't budge, baby."-VPW......It's sprinkled throughout all the other classes as well, with the exception, maybe, of Keys to Research. A lot of ex Way people are still stuck in that denial mode. You can see the evidence of it regularly on facebook. I consider them to be victims until they start to use that stubbornness in a damaging, oppressive way.
edit: I wanted to add that this doesn't only apply to Bible matters. I've encountered many ex-Way people who are entrenched in this anti-critical thinking mindset. It can be maddening trying to reason with them. Sometimes they even show up on GSC to let us all know had severely we've been led astray. Such is life.