Doing some more math on why 2-2 gives us overwhelming odds to make the playoffs.
1) Like I mentioned before, 4 teams fighting for 3 PO spots (GB, DET, SF, CHI for NFC North and 2 WC spots)
2) Bears play all 3 of those teams, meaning that if they go 2-2 they have beaten at least one of them
3) If the Bears beat CLE and DET, the Lions would have won win their 3 remaining games (@ LAR, PIT, @ MIN) to tie the Bears, and it comes down to tiebreakers
4) If the Bears beat CLE and SF, the Bears would own the H2H tiebreaker over SF, meaning SF would have to win its 3 remaining games (TEN, @ IND, SEA) to pass the Bears. Easier schedule but still
5) If the Bears beat CLE and GB, there's a little more doubt since they lose the H2H to SF and DET, meaning SF could go 1-2 and pass the Bears, the Lions 2-1 and pass the Bears and the Packers 2-1 to pass the Bears. But thats still 3 things that have to happen against the Bears
6) If the Bears lose to CLE and beat 2 of the other 3 teams, they're not locks but they've put themselves in a position where either DET and SF need to win out, or one needs to win out and the Packers need to go 2-1 to be left out.
There are plenty of other scenarios to consider like 3 or 4 team tiebreakers, a slide by the Seahawks or Rams bringing them into the mix (though I think we established last week that we cannot tie the Seahawks and Rams without also winning the tiebreaker over both), but for 2 team tiebreakers thats how it looks.