Anchor: The fellow must be at least twenty years younger than she is! 
Entailed: She is at least twenty years older than him.
Contradiction: He is a bit older than she is.
Contradiction: An increase in Social Security surplus leads to an increase in national savings.
Contradiction: The boy is sleeping in the man's lap.
Contradiction: Banditos are well known for doing these types of operations. 
Contradiction: Madeira has a plethora of natural gifts, impressive for such a small place.