context: There is almost no chance that Greg is a swan. It is likely that Sandra grabbed the milk. It is likely that Julius is yellow. We believe that if Julius is yellow, or Greg is a swan, then Bill went to the kitchen. Chances are slight that if Greg is a swan, and Julius is yellow, then Lily is gray. It is improbable that if Julius is yellow, or Sandra grabbed the milk, then Brian is green.
hypothesis: It is almost certain that bill went to the kitchen, or Greg is a swan.
valid_hypothesis: Chances are about even that bill went to the kitchen, or Greg is a swan.
invalid_hypothesis: It is almost certain that bill went to the kitchen, or Greg is a swan.
hypothesis_assertion: Bill went to the kitchen, or Greg is a swan.