Anchor: Have you any reason to believe that your mistress was likely to take a sleeping powder last night?"
Entailed: Do you think your mistress took a sleeping powder last night? 
Contradiction: Your mistress was awake all night. 
Contradiction: City workers are repairing a road.
Contradiction: When it's convenient, we use a credit card when it's not going to cost us money.
Contradiction: The hikers are descending down the mountains.
Contradiction: The bird flies towards the people.