Anchor: A boy with an orange shirt smiles, while a boy in a blue shirt looks on.
Entailed: A boy smiles.
Contradiction: A boy frowns.
Contradiction: You've never had them. 
Contradiction: I've lived in countries that use both systems.
Contradiction: He did not dare rethink the thoughts he had had.
Contradiction: Newsweek criticizes NATO for overcomplicating the issue of civilian casualties.