Then why does the left regularly state there is a consensus -- and that the debate is over? I mean I don't recall anyone on the right claiming the consensus had to be 100% either. I think you added that on your own.
Bill Belichick learned to film signals of opponents from the former Chiefs, and Charger's coach Schottenheimer. Others like Edwards, Johnson and Cowher did too. They learned from the CHEATS and CHEATERS who still couldn't win.