Anchor: The Evaluation of Broad Aim  Experimental Design, Its Difficulties and an Alternative.
Entailed: Evaluating broad aim experimental design along with its alternatives and difficulties. 
Contradiction: There are no difficulties included with broad aim design.
Contradiction: It is definitely a net inflow of resources to the Treasury because the cash received far outweighs any debt.
Contradiction: The man and boy are fishing.
Contradiction: two men play tennis
Contradiction: a woman is riding