I was having a debate via text message with a pimi elder friend recently and what struck me was his complete inability to use his own brain to reason.
I know this isn't that surprising for a Jw but any question I asked was answered with a link to jw org. He wasn't willing or able to discuss anything that required him using his own critical thinking.
It became obvious that if I didn't accept without question the articles in the links he provided, that it was my problem. He wasn't interested in whether they answered my question or not and he refused to discuss it further.
So yes, I have witnessed the outcome of an 'education' program which is literally making people more stupid.