Anchor: For, about twelve feet away from me, John and Mary Cavendish were standing facing each other, and they were evidently quarrelling. 
Entailed: I happened to walk in on John and Mary Cavendish who were arguing with each other. 
Contradiction: I happened to walk in on Poirot and Japp who were arguing with each other.
Contradiction: Two guys are sitting.
Contradiction: The besiegers lost almost quadruple the number of lives.
Contradiction: Two old women are watching ducks swim by.
Contradiction: dogs running through field