I can be shown a reasonable stand of proof. I had Rob Coleman email you. He learned PP from Burges course. And those who are TOO sceptical miss out on most of life. Which proves nothing.
People do just fine with missing legs, arms, fingers, organs, eyes, and such.
But that doesn't mean this is the way to go. Plenty of folks do just fine thank you without these. No - it's something YOU need. A person with well developed perfect pitch and good musical skills can not only do this, but also tell you the key and individual notes. The truth is, they're two different skills.