Anchor: We believe that insights into the burden of the USO can be gained by comparing postal systems.
Entailed: Comparing postal systems could gain insights into the USO burden. 
Contradiction: Insights into the burden couldn't be gained by comparing postal system.s 
Contradiction: It was normal for him to be absent.
Contradiction: There are two dogs.
Contradiction: the snow is six feet deep in the road
Contradiction: Some people taking a walk outside.