Anchor: Vocalist singing into a microphone.
Entailed: Something is being sung into a microphone.
Contradiction: The vocalist sings without a microphone.
Contradiction: Alabama's black electorate has not grown at all. 
Contradiction: Dublin was bombed at least twice during World War Two.
Contradiction: A woman is standing with a broom, ready to send the feral cats away from her door.
Contradiction: A man is playing his acoustic guitar outside.