context: It is highly unlikely that Bernhard is a swan. Chances are about even that Mary went to the bedroom. It is probable that John grabbed the milk. Chances are about even that if either John grabbed the milk, or Bernhard is a swan, then Winona is a sheep. It is highly unlikely that if Mary went to the bedroom, and Bernhard is a swan, then Greg is a lion. We believe that if Mary went to the bedroom, and John grabbed the milk, then Sumit is thirsty.
hypothesis: It is unlikely that either John grabbed the milk, or Greg is a lion.
valid_hypothesis: It is probable that either John grabbed the milk, or Greg is a lion.
invalid_hypothesis: It is unlikely that either John grabbed the milk, or Greg is a lion.
hypothesis_assertion: Either John grabbed the milk, or Greg is a lion.