Note that the effects of Postal Service adjustments could be substantial and widespread, not only on mailers who have invested heavily around the present structure of products and rates, but also on such competitors as newspapers.
The Postal Service changes will have no effect on competitors.
mnli hypothesis: The Postal Service changes will have no effect on competitors. premise: Note that the effects of Postal Service adjustments could be substantial and widespread, not only on mailers who have invested heavily around the present structure of products and rates, but also on such competitors as newspapers.