context: It is probably not the case that Lily is a rhino. There is little chance that Greg is a swan. There is little chance that John went to the garden. We believe that if either Lily is a rhino, or Greg is a swan, then Brian is yellow. It is highly likely that if Lily is a rhino, or Greg is a swan, then Mary got the milk. It is unlikely that if Lily is a rhino, and Greg is a swan, then Bernhard is a frog.
hypothesis: We doubt that lily is a rhino, and Mary got the milk.
valid_hypothesis: We doubt that lily is a rhino, and Mary got the milk.
invalid_hypothesis: It is highly likely that lily is a rhino, and Mary got the milk.
hypothesis_assertion: Lily is a rhino, and Mary got the milk.