context: It is probably not the case that Julius is a swan. Chances are slight that Lily is a swan. It is highly likely that John grabbed the milk.
hypothesis: There is little chance that john grabbed the milk, and Lily is a swan.
valid_hypothesis: There is little chance that john grabbed the milk, and Lily is a swan.
invalid_hypothesis: We believe that john grabbed the milk, and Lily is a swan.
hypothesis_assertion: John grabbed the milk, and Lily is a swan.