premise: Several men in black t-shirts and caps are using with metal rods to smash food that's lying on a round table with a hole in the center. hypothesis: a bird flies.
contradiction: The subject is either a bird or a group of several men.|contradiction: A bird is not a man.|contradiction: these are totally contradictory and don't make sense. one sentence has several men and the second a bird. the men are smashing food and the bird is flying.