Anchor: Three kinds of theories of history have been prominent in recent discussion--ending theories, wave theories, and cycle theories.
Entailed: There are three kinds of theories of history.
Contradiction: There are only four different theories on history.
Contradiction: the child was 18 years old
Contradiction: A man is cooking a pancake.
Contradiction: She mulled over what they had said, then settled on an answer.
Contradiction: Evaluations of each sample allows for correction in the items sampled.