Anchor: Even so, Abraham's trough-to-peak comparison does not support his point.
Entailed: Abraham's trough-to-peak comparisons did not help his case.
Contradiction: Abraham's trough-to-peak comparison helped his point substantially. 
Contradiction: Water spills over the edge of a waterfall.
Contradiction: They should feel embarrassed.
Contradiction: Visiting Charlie the dolphin, who will swim up to play with those who come to see him, is the highlight of the trip.
Contradiction: Boys pose for a picture.