Anchor: Could not Mrs. Inglethorp have made a will in her favour? Poirot shook his head. 
Entailed: Is it possible the wife created a will for herself?
Contradiction: Possible or not, it does not matter because this case doesn't exist.
Contradiction: The men are watching tv.
Contradiction: A police car sits in the background while people bring food to a table.
Contradiction: A St. Bernard is flying near the ocean.
Contradiction: Sea coastguards are watching for problems.