Anchor: Cummins built production representative prototypes of its engines to demonstrate that the design and the engine hardware would perform to requirements.
Entailed: Prototypes were used to prove that the design would work.
Contradiction: Cummins decided not to waste time on a prototype.
Contradiction: A man imagines seeing a yeti and attempts to escape.
Contradiction: An elder man prepared to get his haircut.
Contradiction: The man is washing his car
Contradiction: A person is serving goods to the plane's passengers.