The Detroit Lions handily defeated the Chicago Bears, never looking back after pouring on 52 points against Dennis Allen's defense in a huge NFC North game with plenty of bragging rights on the line. It was never a close competition, with one unit obviously a contender, and with the other with so much more work to do to get close to that echelon.
Chicago has a ton of questions to answer on offense, to be sure. But on defense, they shouldn't be anywhere near as bad as giving up 52 points in a game. It's incredible hard to score that much in the NFL - the Bears defense made it look very easy to accomplish.