Anchor: They disappeared in the distance.
Entailed: Off in the distance was where they vanished.
Contradiction: They remained in off in the distance indefinitely.
Contradiction: No other options need to be taken into consideration of the design team can't satisfy the exit criteria.
Contradiction: two crew members on the boat deck
Contradiction: Here you can walk past many grocery stores, malls and restaurants. 
Contradiction: A man is wearing black.