Anchor: We have said that the features distinguishing case studies from other methods are how sites are selected, how the data are collected, and how they are analyzed.
Entailed: Features distinguish case studies from other methods.
Contradiction: Sites are not collected.
Contradiction: Two black men are watching a play
Contradiction: At my age, I wasn't required to do that.
Contradiction: The effect is disappointing and depressing.
Contradiction: It is a mark that was not paid attention to often enough.