Anchor: The guy in the blue shirt and jeans performs a grab trick on his skateboard.
Entailed: A guy is doing skateboard tricks.
Contradiction: A guy is riding his bike to school.
Contradiction: This is the absolute truth, Kirby. 
Contradiction: I didn't know about this great news.
Contradiction: A Skittle rainbow is shining
Contradiction: The Aegean Islands were under the influence of the Myceanneans.