Anchor: Rule 504(a) authorized the Postmaster General to maintain a research and development program, and to conduct experiments to enhance the operational efficiency and economy of the postal system.
Entailed: There is an enhancement in the efficiency of the program.
Contradiction: The the postal system does not benefit from research.
Contradiction: The man is at his funeral.
Contradiction: It goes in multiple different directions. 
Contradiction: One of the women is wearing only bikini.
Contradiction: Two children are wrestling.