premise: A young man, wearing a white shirt, prepares hotdogs on a small grill. hypothesis: A young man is grilling fish in his underwear.
contradiction: Hotdogs are not fish.|contradiction: He is grilling either fish or hotdogs, on a grill or in his underwear.|contradiction: The phrase "in his underwear" suggests that the man is not wearing a shirt; hotdogs and fish are different food items.