Anchor: Requirement or system component must be able to perform.
Entailed: Out of requirement and system component, one must be able to work.
Contradiction: Requirement and system component are both not necessary.
Contradiction: People are playing baseball in the rain.
Contradiction: The children had an impact on the decision. 
Contradiction: You can view the Grand-Cul-de-Sac bay from the lowest point on Vitet road.
Contradiction: The courtyard houses in this district now serve as restaurants and shops.