Anchor: On a multi-story construction site a number of workers in red shirts lean on temporary railings and rest.
Entailed: There are workers at the construction site.
Contradiction: All the construction workers are busy pouring concrete.
Contradiction: I did not have to replace mine.
Contradiction: The preamble to the rule says the rule won't hurt them much.
Contradiction: He raised his empty hands. 
Contradiction: Perigord is known for its good food and cave art.