I'm an average bloke and I can't understand all this.
On the other hand I find Isaac Newton's laws of motion and universal gravitation to be simple - if I set my mind to it I could probably figure them out from first principles and a bit of experimentation in a week or so. Newton's "genius" was relative to the average dumb bloke of his time.
I'd be surprised if "an average bloke" could work it out that way. Newton didn't and he was brilliant. He neither worked from first principles or used deductive reasoning. Most of us could only work it out by knowing the answer or something close to it, which is the situation you describe.