context: It is certain that Bernhard is a lion. It is probable that Daniel left the apple. It is almost certain that Julius is green. It is probable that if Daniel left the apple, or Julius is green, then Lily is gray. Chances are about even that if either Daniel left the apple, or Julius is green, then Greg is a swan. It is impossible that if Bernhard is a lion, or Daniel left the apple, then Sandra grabbed the milk.
hypothesis: We believe that sandra grabbed the milk, or Greg is a swan.
valid_hypothesis: We doubt that sandra grabbed the milk, or Greg is a swan.
invalid_hypothesis: We believe that sandra grabbed the milk, or Greg is a swan.
hypothesis_assertion: Sandra grabbed the milk, or Greg is a swan.