Anchor: One begins with the view that the postal system is a vertically integrated network involving the collection, sorting, transporting, and final delivery of mail.
Entailed: The postal system is a network that collects, sorts, transports and delivers mail.
Contradiction: The postal system is designed only to sort mail. The collection and transporting of the mail is up to the US Army.
Contradiction: The speed boats are all docked at the shore.
Contradiction: Both versions may be seen, though only one of them is official.
Contradiction: The man is on the ground
Contradiction: His ability to perform his job proficiently can be due to a couple of reasons.