Sorry to digress from the Wales game (although they played well)….
Looking at he the Eng/Sco/Arg group there are several possibilities for qualification.
If Scotland beat England by more than 7pts and Argentina win without a BP then all three sides will have 14pts. On head-to-head this would rank Scotland above England, England above Argentina and Argentina above Scotland. (I’m assuming Scotland won’t get 4 tries in any scenario.) This would leave points difference as the decider so with Eng 79, Arg 32, Scot 18 (currently) that order is unlikely to change enough so Eng/Arg qualify.
If Scotland win by 7pts or less then England get 15pts and win the group and Argentina are second if they win whether or not they get the bonus point.
If Scotland win by more than 7pts and Argentina win with a bonus point then Argentina win the Group with Scotland second.
If Scotland lose they could still qualify but they’d need a bonus point and Argentina to lose by more than 7pts.
Think that covers it? 🙂