Anchor: The opera hat is no longer the preserve of the rich; it is, if anything, a cathedral of gay culture.
Entailed: The opera hat used to be the preserve of the rich.
Contradiction: The opera hat used to be the preserve of the poor.
Contradiction: This was the first time I've thumped on Derry's door in the morning. 
Contradiction: The man is smiling.
Contradiction: Nothing aroused my suspicions and the trap caught me by surprise.
Contradiction: It's the same thing again and again.