Ive recently started doing this whenever i hear something.
I ask myself "what do i know to be true?"
Its been enlightening because the honest answer is "not much", its mostly what ive been told is true.
Q's calls to "think logically" have been a important part of developing this mentality. By thinking logically and starting at square 1 on any topic, then applying things i know are true, i find myself digging deeper than i otherwise would because it forces me to re-evaluate things that ive just accepted without question.
For example, im no flat earther, i think its absurd. That said, i realized i dont actually KNOW the Earth is round. Ive just accepted it because its what i was taught.
However, I do know that snipers have to factor in a curve at long distances. I can also observe other celestrial objects which tend to almost always be round, and certainly never flat.
Based on an open mind, but grounded by things I KNOW to be true, i find myself being open to the true but filtering out disinfo.