Anchor: A better explanation is that males' reproductive fate depends more strongly than females' on competing when they are young.
Entailed: Male's reproductive system functions better when they are younger. 
Contradiction: Men never have performance issues, in fact women do. 
Contradiction: The biker is riding the bike.
Contradiction: A girl is singing
Contradiction: We don't need to change anything because it's already completely optional.
Contradiction: There is a dog in the photo.