Anchor: The product's design is stable when all stakeholders agree that engineering drawings are complete and that the design will work and can be built.
Entailed: The design is stable once everyone agrees that the design is complete, will work and can be built. 
Contradiction: There need not be agreement for a design of a product to be stable. 
Contradiction: The football players are sitting in the locker room.
Contradiction: Daniel Hungerford pointed out that the emergency department has some realities to be considered.
Contradiction: No children are wearing coats.
Contradiction: A guy partakes of a winter sport.