Don’t fool us again, Cowboys

Bob Donnan-USA TODAY Sports This is the key relationship.A certain amount of skepticism, even cynicism, is rather normal for fans of the Dallas Cowboys. We have, after all, been sold a bill of goods before. Rob Ryan was brought in to take the defense to the next step. The staff assured us that Quincy, or Chad, or Vinny, or Drew, or the other Drew, or Brandon was capable of leading this team to the playoffs. Oh, and Greg, or Rolando, or David was going to be a terror on defense. And we just went through the entire wide-receiver-by-committee debacle.

So it is no surprise that some are still not comfortably sold on the changes that Kellen Moore is now expected to bring to the offense, no matter…