Anchor: A merciful providence just saved me in time from falling into the trap.
Entailed: I was lucky enough to realize just in time that it was a trap.
Contradiction: I could not realize in time that there was a trap, and I fell right into it.
Contradiction: An old man is sleeping outside.
Contradiction: Three people are outside.
Contradiction: The model estimates concentrations of either inert or chemically reactive pollutants 
Contradiction: The man is in front of a rock.