Anchor: A man on a ladder works with tree branches.
Entailed: A man is on a ladder.
Contradiction: A man is n a step-stool working with tree branches.
Contradiction: The school cafeteria is crowded.
Contradiction: Laws were passed that required action on the part of agency management.
Contradiction: According to critics, all immigrants should be naturalized.  
Contradiction: It's a great place for bass fishing, they hold tournaments there.