The Cowboys have a very weak schedule in the second half of the season. They only play one team over .500 which is the Steelers on December 17th. In the last season and a half Dallas is 7-1 against sub .500 teams with the only loss coming against Arizona last December. They may play down to the competition, but they still win most of those games.
I don't think it's unreasonable to think with the schedule that we have that this football team can go 7-1 the rest of the way. Doesn't mean it'll happen, but it can. Just gotta believe.