Anchor: The instance may be selected because it has been affected by events of interest, such as the desegregation of schools.
Entailed: The instance can be selected because it was affected by events. 
Contradiction: The instance cannot be selected. 
Contradiction: I felt happy and calm.
Contradiction: A man is drinking an alcoholic beverage.
Contradiction: On that issue hangs the debate on how many moon Saturn has.
Contradiction: These stories have had the effect of crying wolf.