In the long tradition of teams built on offseason hope and opening-night reckoning, the Dallas Cowboys met their first honest mirror in New Jersey. Jerry Jones had sensed it before kickoff — a rare admission of vulnerability from a man who trades in certainty — and the Giants, reshaped by John Harbaugh's physical philosophy, confirmed every quiet fear. A 28-20 defeat was less a score than a diagnosis, revealing that the defense Dallas had spent months constructing was not yet what it needed to be.