My empirical evidence is your posts all over this forum in which you've failed to grasp even the basics of your chosen field for literally years on end. This, it strikes me, is plenty good enough evidence that we're not faced with a remarkable mind here.
As it happens, I personally think the ability to become the possessor of a remarkable mind is actually within a lot of people's grasp. I think it's largely a matter of disposition and character; whether you have the temperament and humility to be able to continually revise what you know, refine where you're on the right track, discard where you're not and so on.
But as I've said already, if you're going to be as determined not to learn, and as unwilling to budge from your preconceived positions as you plainly are, then you're not going to get there.
To repeat: this thread opens with you referencing Frindle about recording levels for digital. He says the exact opposite of what you think he does. There's a simple issue of reading comprehension to deal with before even getting anywhere near the more esoteric aspects of this. Your problem is that you don't want to do the spade-work; you're lazy, and you're arrogant. This is why you're not much good at engineering.