Anchor: Such action, he maintained, was not cost-effective.
Entailed: He maintained to say such action was not cost-effective.
Contradiction: He maintained to say such action was cost-effective.
Contradiction: It is not on the TV on Saturday night.  
Contradiction: A description of the requirement for resources is so restrictive that only a particular model manufacturer's products will meet it.
Contradiction: A person sleeps in the rain.
Contradiction: I'm not sure what they are.