Anchor: Another situation where program implementation case studies may be called for is when concern exists about implementation problems.
Entailed: Program implementation case studies can be useful when a concern exists about the implementation.
Contradiction: Program implementation case studies are never useful, so they are banned.
Contradiction: Ackee cooked with saltfish is not available for sampling. 
Contradiction: A man in a black shirt plays a video game.
Contradiction: It was odd at your place.
Contradiction: A girl in a multi-colored outfit is sitting by the water.