context: It is likely that Bill is in the school. We doubt that Bernhard is white. It is highly unlikely that Fred dropped the apple. It is probable that if Bill is in the school, or Fred dropped the apple, then Brian is gray. It is highly likely that if Bernhard is white, and Bill is in the school, then Mary went to the garden. It is impossible that if Bill is in the school, and Fred dropped the apple, then Greg is gray.
hypothesis: It is almost certain that fred dropped the apple, and Mary went to the garden.
valid_hypothesis: It is impossible that fred dropped the apple, and Mary went to the garden.
invalid_hypothesis: It is almost certain that fred dropped the apple, and Mary went to the garden.
hypothesis_assertion: Fred dropped the apple, and Mary went to the garden.