23 Competitors understand clearly that 15-ounce pieces of saturation mail can be carried privately for less than Standard-A rates, while 4-ounce pieces cannot.
The Postal service is charging too much for 4 ounce pieces of mail.
mnli hypothesis: The Postal service is charging too much for 4 ounce pieces of mail. premise: 23 Competitors understand clearly that 15-ounce pieces of saturation mail can be carried privately for less than Standard-A rates, while 4-ounce pieces cannot.