Anchor: If it had been Monsieur John, I could have understood it. 
Entailed: If it had been John, I could have understood.
Contradiction: If it had been Matt, I wouldn't have understood.
Contradiction: She arrives from Middlingham with no shred of evidence in her possession.
Contradiction: They patched me up and helped me out as thought I was family.
Contradiction: Segovia has no historical monuments.
Contradiction: A dog is running.