Anchor: Sex sometimes includes a heartening oration, but usually toward the end, urging you on to mutual victory; such remarks are rarely delivered at halftime, when you're lurking in the locker room, glum and battered.
Entailed: There is a goal of mutual victory in sex.
Contradiction: There is no goal of mutual victory in sex.
Contradiction: Two men are baking a cake.
Contradiction: The woman is outside.
Contradiction: A cowboy is hunting deer.
Contradiction: He started a law practice for Latino workers.