Anchor: A man flips his skateboard in midair above the concrete ground.
Entailed: A man is on a skateboard.
Contradiction: A man is sleeping on the couch.
Contradiction: A man rides a bike through the park.
Contradiction: it was so cold in Alaska that the gas in your car would turn to slush 
Contradiction: I wish to draw your attention to the picture on the right.
Contradiction: I muttered than they applauded.