context: A man in a black shirt opening his mail.
hypothesis: There is little chance that a man in a black shirt is about to open his cable bill.
valid_hypothesis: There is little chance that a man in a black shirt is about to open his cable bill.
invalid_hypothesis: There is a better than even chance that a man in a black shirt is about to open his cable bill.
hypothesis_assertion: A man in a black shirt is about to open his cable bill.