Anchor: Come now, urged Poirot encouragingly. 
Entailed: Poirot urged the person to come.
Contradiction: Poirot told them to leave.
Contradiction: A person listens to his mp3 player.
Contradiction: The woman has her mouth covered while she is among company.
Contradiction: they are not here
Contradiction: Tuppence said, "That's it!" and went upstairs.