Text: Under the presumption that the postal monopoly applies in its clearest form only to the final delivery process, where scale economies are likely the greatest, the worksharing notion is that a discount should be offered to mailers or competitors1 who do portions of the postal work and then turn the mail over to the postal service for completion of delivery.
Entailment: Under the presumption that the postal monopoly applies only to the final delivery process, where scale economies are greatest, the notion is that a discount should be offered to competitors who do part of the work and then turn the mail over to USPS.
Contradiction: Under the presumption that the postal monopoly applies only to the final delivery process, where scale economies are smallest, no discount should be offered to customers.