Week 7 is guaranteed to be the first week of the 2020 season in which an NFC East division team doesn’t lose to a non-divisional opponent. The reason is that the four teams play each other, with the Giants @ Eagles kicking off the week on Thursday Night Football. The Cowboys will travel to Washington for a Sunday afternoon matchup.
I thought it might be useful to use a decision tree format to look at what the possible outcomes are for the division standings come Sunday night. There are only four:
If Dallas wins on Sunday, then the Cowboys retain control of first place in the division and the Washington Football Team stays mired at the bottom of the division.