Anchor: Professor D  , the great 231 alienist, was present.
Entailed: Professor D was a great 231 alienist. 
Contradiction: Professor D, the great 231 alienist, was absent. 
Contradiction: Girls playing a carnival game
Contradiction: I'm uncertain as to whether we would make a good couple.
Contradiction: The agencies are the quickest to implement the circular.
Contradiction: It is child's play to me.