premise: A man in a white shirt, dark shorts and a red cap is standing in a small green rowboat with green oars, in the middle of what appears to be a shallow river, against a bank of tall dried grasses. hypothesis: The man is fishing in the lake.
contradiction: The man cannot be standing in a green rowboat and fishing in the lake simultaneously.|contradiction: He can be in either a river or a lake.|contradiction: The man is either standing or fishing in the lake.