context: There is a better than even chance that Julius is a rhino. It is highly likely that Mary dropped the milk. It is probable that Fred discarded the milk.
hypothesis: It is impossible that mary dropped the milk, and Julius is a rhino.
valid_hypothesis: Chances are about even that mary dropped the milk, and Julius is a rhino.
invalid_hypothesis: It is impossible that mary dropped the milk, and Julius is a rhino.
hypothesis_assertion: Mary dropped the milk, and Julius is a rhino.