Bill Belichick has forgotten more about the game of football than I will ever know. This is no secret; even when I actively played football, I was less of a scheme guy and more of a vibes-based linebacker—we lost a bunch of games. The finer points of the game, specifically the kind of knowledge that a coach would need, always paled in comparison to the forces of nature clashing on the field, and head injuries and time have eaten away at what knowledge I did once possess.
There is maybe no one alive who knows more ball than Coach Belichick.