context: Chances are about even that Brian is a swan. It is highly likely that Lily is a rhino. It is highly unlikely that Greg is a lion.
hypothesis: Chances are about even that brian is a swan, and Lily is a rhino.
valid_hypothesis: Chances are about even that brian is a swan, and Lily is a rhino.
invalid_hypothesis: It is highly unlikely that brian is a swan, and Lily is a rhino.
hypothesis_assertion: Brian is a swan, and Lily is a rhino.