Anchor: I was bewildered, but I knew that it was no good asking him to explain. 
Entailed: I knew it wasn't good to ask him. 
Contradiction: I knew it was good to ask him.
Contradiction: No, I don't like that.
Contradiction: The Acid Rain Program wanted to reduce SO2 emissions.
Contradiction: She fell off the ladder and made a huge sound, alerting the foe.
Contradiction: The black dog chased the spotted dog across the grass.