If reasoning and critical thinking was not a problem, the org would not be so insistent on avoiding apostate material or any other information critical of the org. They know that there is a good chunk of members out there who have a weak shell (that is actually a good thing) and could be easily pierced. Provided they are willing to listen, even if just a little bit. With that said, emotions do play a big role and I did not want to accept it at first.
I think emotions, however, can have a bit of logic built-in. Not as easy to dwell on as plain math where 2+2=4 no matter who you love or what party you are affiliated with. But you could call it the Barney principle. I love you, therefore you love me. But when one of those sides fails, then the logic is destroyed and the questions begin to raise. Once the emotions are removed, then the questioning can begin.
Unfortunately, is much easier said than done.