Okay, let me try to go to your original theme, and you can judge whether I have any "wisdom."
Here's my take on the question of "who can perfectly reason that their belief is singularly true?" Nobody, because then it would no longer be a belief, but an established, incontrovertible fact. "Perfect" reasoning allows for the admission of no errors, nor the omission of contrary evidence, but most importantly, "perfect" reasoning does not permit foundational axioms to be potentially false. One can take, for example, the axiom "God is maximally good," but there is nothing in the world that gives the slightest hint that is true, and a great deal in the world that suggests it is not. Therefore, your "perfect reasoning" would have to omit that axiom. Along with, I'm sure you can see, a great many others.
However, I contend it is very often possible, for those who are willing to make the effort, to reason when a belief is in direct contradiction of reality, and having done so, come to the conclusion that that belief, at least, cannot be true, as held. Over my time here, I have given, many, many examples of beliefs that members have professed, where cold-hearted reasoning, based on the evidence before us, have shown those beliefs to be untenable. I'm not going to list them again, but will respond to anyone who asks, so long as the belief in question is clearly stated.