context: It is probable that Brian is a rhino. It is impossible that Mary went to the bedroom. It is impossible that Julius is yellow.
hypothesis: It is impossible that julius is yellow, and Brian is a rhino.
valid_hypothesis: It is impossible that julius is yellow, and Brian is a rhino.
invalid_hypothesis: Chances are about even that julius is yellow, and Brian is a rhino.
hypothesis_assertion: Julius is yellow, and Brian is a rhino.