context: It is impossible that Brian is yellow. There is a better than even chance that John dropped the milk. It is highly likely that Bill discarded the milk.
hypothesis: Chances are about even that bill discarded the milk, and John dropped the milk.
valid_hypothesis: Chances are about even that bill discarded the milk, and John dropped the milk.
invalid_hypothesis: It is almost certain that bill discarded the milk, and John dropped the milk.
hypothesis_assertion: Bill discarded the milk, and John dropped the milk.