Anchor: By the time he learned to use it, night had fallen, and he was too tired to try anything more.
Entailed: Night had fallen by the time he figured it out and was too tired to try anything else.
Contradiction: He figured it out in no time at all and went straight to work.
Contradiction: Two boys burying another boy in the sand.
Contradiction: I don't have a clear memory about the details of my life  when I was ten.
Contradiction: A woman standing outside with a purse.
Contradiction: When my kids were small, I spent a lot of time camping.