context: A man walks down the alley talking on his cellphone.
hypothesis: It is highly likely that a man is walking down a colorful alleyway while talking on a cell phone.
valid_hypothesis: There is almost no chance that a man is walking down a colorful alleyway while talking on a cell phone.
invalid_hypothesis: It is highly likely that a man is walking down a colorful alleyway while talking on a cell phone.
hypothesis_assertion: A man is walking down a colorful alleyway while talking on a cell phone.