context: Chances are about even that Brian is a rhino. Chances are slight that Julius is a swan. There is a better than even chance that Greg is a rhino.
hypothesis: It is highly unlikely that julius is a swan, and Brian is a rhino.
valid_hypothesis: It is highly unlikely that julius is a swan, and Brian is a rhino.
invalid_hypothesis: Chances are about even that julius is a swan, and Brian is a rhino.
hypothesis_assertion: Julius is a swan, and Brian is a rhino.