context: It is highly likely that Brian is yellow. It is probable that Julius is a rhino. We believe that Mary got the football.
hypothesis: It is almost certain that julius is a rhino, and Mary got the football.
valid_hypothesis: Chances are about even that julius is a rhino, and Mary got the football.
invalid_hypothesis: It is almost certain that julius is a rhino, and Mary got the football.
hypothesis_assertion: Julius is a rhino, and Mary got the football.