Here’s how critical Philadelphia’s game at Dallas will be on Thanksgiving Day: The winner can start thinking about a home postseason game, maybe even a bye for the wild-card round. The loser winds up needing to win the rematch in 17 days to be viable in the NFC East.A sweep by either the Eagles or Cowboys, both 8-3, makes that team a contender for top record in the conference. It also puts the loser in a scrambling position just to make the postseason.A juicy serving, no doubt, with the Cowboys (No.