Anchor: The marginal cost of SO2 and NOx reductions through 2015 are less than $450/ and $2,300/ton, respectively, in all four multi-emissions reduction scenarios.
Entailed: SO2 and NOx reductions have marginal costs.
Contradiction: SO2 and NOx reductions have no marginal costs.
Contradiction: Urban Malays keep a close eye on their country estates.
Contradiction: The boy is angry
Contradiction: He has caught no fish
Contradiction: They needed an explanation from the agency.