context: We believe that John put down the milk. We believe that Bill went to the office. It is highly unlikely that Greg is a frog. It is certain that if either John put down the milk, or Bill went to the office, then Sandra left the football. It is probable that if Greg is a frog, and John put down the milk, then Bernhard is a swan. It is certain that if Greg is a frog, or Bill went to the office, then Brian is a rhino.
hypothesis: There is little chance that bill went to the office, and Brian is a rhino.
valid_hypothesis: We believe that bill went to the office, and Brian is a rhino.
invalid_hypothesis: There is little chance that bill went to the office, and Brian is a rhino.
hypothesis_assertion: Bill went to the office, and Brian is a rhino.