Anchor: We would have died last night if it were not for you.
Entailed: If not for you, we would have died last night.
Contradiction: We would have been alright without you last night.
Contradiction: I'm quite sure you have never met him.
Contradiction: Buchanan, Choate, and Perot can all be described as southern populists. 
Contradiction: The boy is looking at the monkeys at the zoo.
Contradiction: It is possible to buy oatmeal and whole-wheat flour.