Anchor: Climb to the top for a fine view of the town and river.
Entailed: You can get a good view of the town and river from on top.  
Contradiction: You cannot see the town from on top.  
Contradiction: Two men skateboard in the city
Contradiction: Two woman walk together.
Contradiction: I have no worries about getting my social security when I get that old, I will definitely get it.
Contradiction: Two children racing in sacks.