context: It is highly likely that Fred went to the bedroom. Chances are about even that Brian is a lion. We doubt that Bill put down the milk.
hypothesis: It is highly likely that bill put down the milk, or Fred went to the bedroom.
valid_hypothesis: It is highly likely that bill put down the milk, or Fred went to the bedroom.
invalid_hypothesis: There is little chance that bill put down the milk, or Fred went to the bedroom.
hypothesis_assertion: Bill put down the milk, or Fred went to the bedroom.