premise: Man in blue shirt yells and points off-camera while a man in a blue shirt and baseball cap watches. hypothesis: The yelling man is wearing a white shirt.
contradiction: The man's shirt is either blue or white, but not both at the same time.|contradiction: The man cannot be wearing a blue shirt and a white shirt at the same time.|contradiction: If a yelling man is wearing a white shirt, he can't be wearing a blue shirt.