Even after reading the official tiebreaker rules I have absolutely no idea why the Giants are guaranteed a playoff spot when there are two teams that are 10-5 (Tampa and Carolina) and two teams that are 9-6 (Skins and Cowboys). If the Giants, Tampa and Carolina lose and Dallas and Washington win, everybody is 10-6.

Best I can tell is, Skins would win the East because they have the better record over the division, Tampa would win the South because even with the loss they would have a better division record over Carolina. That would leave, NY, Carolina and Dallas for the two wild card slots. NY would be higher than Dallas because of division records, Dallas would be higher than Carolina based on conference records.

I think the short answer is by eliminating the Vikings, there are only 5 teams for the remaining 4 slots and the Giants own the relevant tiebreakers over Dallas, so no matter what, they would be in. As for what seed they end up, your guess is as good as mine.