I don't know about other people's mind; but, for myself I lived on two layers of thought the entire time I was an active Jehovah's Witness.
Like two walls of glass I could see "out" to the real world through the walls of the compartment I lived in inside my head.
Whenever a troublesome thought, word or deed came into to my mind I simply dealt with it by a REACTIVE process.
The reactive process is a knee-jerk programmed rebuttal process that eliminates the one important step needed for a mind which is alive to reproof:
I NEVER FOR ONE MOMENT CONSIDERED IT POSSIBLE that I was in the wrong religion!
I proceeded to Step 2, which was fighting the intrusive thought with my techniques learned at the Kingdom Hall.
It was ego protection more than anything else. I would not tolerate doubt in myself. The absolute certainty of conviction and faith and assured correctitude is the most powerful force on Earth. That was my mind: certain beyond a shadow of doubt.
And, guess what? I was dead wrong. That will never let me rest!
It took being kicked out, shunned and regarded as a walking dead man to even get me to think of reappraisal. Even then, I did not have the intellectual training or mind tools to look at evidence with anything approaching objectivity. Jehovah's Witnesses remove objectivity from you.
I had to re-examine each and every context, word and definition I held in my mind before I could begin a healing process.
Even today I remain cynical about any authority figure with truth for sale.
I test everything I hold to be true with a view to allowing the possibility I might be in error.
I can never be dead certain again.
Maybe that is a good thing. Maybe not.
Terry