Anchor: Two boys wrestle together in the sand.
Entailed: The boys are outside.
Contradiction: The boys are in the grass.
Contradiction: You have and so have we. 
Contradiction: In May 1618 two royal Catholic officers were thrown out of the window of the Defenestration of Prague.
Contradiction: The coast is too rocky to relax on.
Contradiction: There is a man holding a newspaper.