Anchor: A twenty-five pound gun set on a battery of the imposing castle above the town has fired a single shell.
Entailed: The heavy gun on the castle fired one shot.
Contradiction: The heavy gun on the castle still remains to be shot.
Contradiction: The response is genuine.
Contradiction: The unusual situation can all be explained by Darwinian theory.
Contradiction: Two couples are racing boats.
Contradiction: The baby is riding a sled behind its mother.