context: There is little chance that Greg is a swan. It is probable that Mary got the football. We doubt that Daniel took the milk. It is probably not the case that if Greg is a swan, or Mary got the football, then John went to the garden. We believe that if either Daniel took the milk, or Mary got the football, then Brian is gray. It is highly unlikely that if Mary got the football, and Daniel took the milk, then Julius is a frog.
hypothesis: There is almost no chance that greg is a swan, and Daniel took the milk.
valid_hypothesis: There is almost no chance that greg is a swan, and Daniel took the milk.
invalid_hypothesis: Chances are about even that greg is a swan, and Daniel took the milk.
hypothesis_assertion: Greg is a swan, and Daniel took the milk.