Anchor: A duck flaps its wings near the water.
Entailed: A duck is near the water.
Contradiction: A crow flies over a pond.
Contradiction: They never found a show to fill the other fifteen minutes.
Contradiction: A person running during the day.
Contradiction: He's dumber than I am. 
Contradiction: 35 Yeats of life lost is the bade value with a vsl mean of $3.