Anchor: Whittington and Boris were walking up and down by the bookstall.
Entailed: Boris and Whittington paced side by side.
Contradiction: Whittington and Boris trotted off in different directions.
Contradiction: I put a sleeping curse on you that will make you ill.
Contradiction: A boy jump off a slide.
Contradiction: Miss Howard stayed silent.
Contradiction: The first quintile is two standard deviations from the mean.