Anchor: How he could be such a fool beats me!" But Japp was looking attentively at Poirot. 
Entailed: He wondered how he could be such a fool.
Contradiction: He did not think he was a fool.
Contradiction: A girl is sitting on the beach.
Contradiction: An animal is moving near a falling object.
Contradiction: I wasn't able to get back to my stretching even after they left. 
Contradiction: A man plays his double necked guitar.