Anchor: It's all very well to laugh, but I feel there might be something in it.
Entailed: Laughing isn't a problem, but I think there is something behind the laughing.
Contradiction: Laughing is a crime, the reason doesn't matter.
Contradiction: The arena is missing a horse.
Contradiction: Which depot? 
Contradiction: Boys box in a ring at the gym.
Contradiction: There are many computers and high teaching standards.