Anchor: A teenager has climbed a tree.
Entailed: There is a teenager in a tree.
Contradiction: A teenager has climbed a sheer rock face.
Contradiction: Pro bono attorneys only offer their services to the wealthy. 
Contradiction: It's suggested that real business news is just as popular as it ever was.
Contradiction: Poirot didn't give it a second thought.
Contradiction: a person traveling.