context: There is a very good chance that Fred is in the office. It is impossible that Mary moved to the garden. It is almost certain that Winona is a wolf. We believe that if Mary moved to the garden, and Winona is a wolf, then Greg is a swan. It is probable that if Fred is in the office, and Winona is a wolf, then Brian is yellow. It is impossible that if Fred is in the office, or Mary moved to the garden, then John went to the garden.
hypothesis: Chances are about even that fred is in the office, and Brian is yellow.
valid_hypothesis: Chances are about even that fred is in the office, and Brian is yellow.
invalid_hypothesis: It is impossible that fred is in the office, and Brian is yellow.
hypothesis_assertion: Fred is in the office, and Brian is yellow.