premise: A topless man straps surfboards on top of his blue car. hypothesis: A man is sitting on the couch.
contradiction: The man cannot be strapping surfboards on his car if he is sitting. A couch would be inside of a living room, nowhere near a car.|contradiction: ONE CANNOT BE SITTING ON THE CROUCH AND STRAPS SURFBOARDS SIMULTANEOUSLY.|contradiction: The man either straps surfboards on top of his blue car or he is sitting on the couch.