Anchor: Some people are swimming in water; one has goggles on.
Entailed: Some people are swimming.
Contradiction: No one is wearing goggles.
Contradiction: The Postal Service would never give a discount, no matter what.
Contradiction: The man can ride a bike
Contradiction: Fred Hall said that the poor people do not deserve access to justice. 
Contradiction: The Borneo ironwood produces the world's second most dense and hard timber.