Anchor: A boy at a skate park prepares to slide down a ramp.
Entailed: A boy is at a skate park.
Contradiction: There is a girl preparing to slide down a ramp.
Contradiction: People are eating in a restaurant
Contradiction: Many traditional scholars were critical of him as the result of his political intentions and his debt to Michel Foucault.
Contradiction: These gains have done nothing but made the air more dirty. 
Contradiction: You are aware that was in the water.