context: It is certain that Brian is a rhino. There is little chance that Mary went to the office. It is certain that Sandra took the football.
hypothesis: It is certain that sandra took the football, or Mary went to the office.
valid_hypothesis: It is certain that sandra took the football, or Mary went to the office.
invalid_hypothesis: It is impossible that sandra took the football, or Mary went to the office.
hypothesis_assertion: Sandra took the football, or Mary went to the office.