Anchor: The waitress is placing the cake on a table at a gathering.
Entailed: The waitress is serving food.
Contradiction: The people at the table are just beginning to order their food.
Contradiction: Three women danced eloquently with their partners, as their feet never seemed to touch the ballroom floor.
Contradiction: You have no obligation to fight for the libertarian party to fight everywhere. 
Contradiction: That is going to make it harder
Contradiction: A pair of dogs are close together.