context: It is highly likely that Bernhard is a swan. We doubt that Brian is a lion. It is improbable that Mary moved to the office. It is improbable that if Brian is a lion, and Mary moved to the office, then Fred went to the hallway. There is little chance that if Brian is a lion, or Bernhard is a swan, then Lily is a rhino. It is highly unlikely that if Brian is a lion, and Mary moved to the office, then Daniel grabbed the milk.
hypothesis: Chances are slight that lily is a rhino, or Daniel grabbed the milk.
valid_hypothesis: Chances are slight that lily is a rhino, or Daniel grabbed the milk.
invalid_hypothesis: It is likely that lily is a rhino, or Daniel grabbed the milk.
hypothesis_assertion: Lily is a rhino, or Daniel grabbed the milk.