context: A man with a black shirt, shorts and a black messenger bag, is listening to a man, sitting with black pants and a white t-shirt, playing the guitar.
hypothesis: There is a better than even chance that one man serenades the other man.
valid_hypothesis: There is a better than even chance that one man serenades the other man.
invalid_hypothesis: There is almost no chance that one man serenades the other man.
hypothesis_assertion: One man serenades the other man.