Anchor: Suppose ECP at the margin could be pursued with full knowledge of the effects.
Entailed: Assume that it could be possible to pursue ECP at the margin with full knowledge of the effects.
Contradiction: Assume that the ECP at the margin couldn't be pursued with full knowledge of the effects.
Contradiction: The economy in Korea was and always will be great.
Contradiction: That would be out of the question.
Contradiction: A boy plays on a swingset
Contradiction: He thought he could visit elsewhere.