Anchor: I struck up a conversation with her and was greatly annoyed when one of my friends insisted I interrupt the conversation to go have a word with him.
Entailed:  I started to talk to her but was interrupted by a friend. 
Contradiction: My conversation with her went uninterrupted for hours.
Contradiction: Africans walk through a forest.
Contradiction: The British under auspices of the East India Company were starting to explore into North Borneo.
Contradiction: A man is sleeping.
Contradiction: A boy was in the water.