Anchor: A man is snowboarding and jumping off of a snow hill.
Entailed: A man is doing a snowboard jump off of a snowy hill.
Contradiction: A man is skiing down a flat slope.
Contradiction: A little boy in a green striped shorts is playing beach soccer.
Contradiction: An essential part of human experience is that the value may decrease as a result of efforts to increase the value. 
Contradiction: a dog runs fast
Contradiction: Whitehead has promoted pitting men against working women.