Anchor: i know my roomie's got the ins urance through the school
Entailed: My room mates for insurance through the school.
Contradiction: My room mate does not have insurance.
Contradiction: John spoke so quietly that he could not be heard outside.  
Contradiction: A skateboarder goes down a ramp.
Contradiction: This would be terrible on the Autobahn.
Contradiction: people are on deck