Anchor: Therefore, it may be possible for a fairly simple model to explain total and unit cost differences between posts.
Entailed: There is no need for a complex model for explaining cost differences between posts.
Contradiction: The cost differences between posts require a very intricate model for explaining them.
Contradiction: The use of automation has no impact on the operation of a postal system.
Contradiction: A group of people are together around a big rink.
Contradiction: A girl is walking at the mall.
Contradiction: Incumbents seem unaware that they can be voted out.