There are lessons in football that are subtle and hard to discern. And then there are the ones that come up and punch you right in the mouth, then sit on your chest shouting in your face just to make sure you get the message. The second type is what we have after the Dallas Cowboys suffered another frustrating loss on Thanksgiving. The 36-33 overtime defeat at the hands of the Las Vegas Raiders really leaves them with one thing to focus on. They now have to figure out how to win the NFC East.