Anchor: Climber on rock formation using ropes.
Entailed: The climber is on a rock.
Contradiction: Climber on rock formation using twizzlers.
Contradiction: There is a climber using nothing but his bare hands to climb a rock formation.
Contradiction: The climber fell to his death.
Contradiction: Climber on rock formation, preparing to blow it up.
Contradiction: A climber decides to leave his ropes behind.