context: It is probably not the case that John discarded the milk. There is a better than even chance that Bill went to the cinema. It is probable that Emily is a mouse. There is a better than even chance that if Emily is a mouse, or John discarded the milk, then Sandra got the apple. It is likely that if Emily is a mouse, or John discarded the milk, then Julius is a swan. There is little chance that if either Emily is a mouse, or John discarded the milk, then Brian is a rhino.
hypothesis: There is a better than even chance that bill went to the cinema, and Brian is a rhino.
valid_hypothesis: It is highly unlikely that bill went to the cinema, and Brian is a rhino.
invalid_hypothesis: There is a better than even chance that bill went to the cinema, and Brian is a rhino.
hypothesis_assertion: Bill went to the cinema, and Brian is a rhino.