Anchor: The framework within which these issues will be considered is the existing United States postal system, about which the author knows a little.
Entailed: We will compare it to the US postal system as it operates now.
Contradiction: We will compare it to the US postal system as it operated in 1950.
Contradiction: Tuppence sneaked inside the Mansion and went to door No. 21.
Contradiction: People are very materialistic that own homes in North Dallas. 
Contradiction: A man is dancing with wire.
Contradiction: It can be taken whenever you want to.