Anchor: Insects, frogs, and birds call together in a cacophony of sound.
Entailed: Insect, frogs, and birds make noises.
Contradiction: Insects, frogs, and birds stay silent.
Contradiction: The man and his lover are embracing under the moon light at the beach.
Contradiction: A man in a Ginobili #20 jersey stands in a cubby by a chair.
Contradiction: The son died when he was hit with the computer monitor. 
Contradiction: The F-22 program was an extreme design challenge.