context: It is certain that Julius is a rhino. It is likely that Mary went to the office. It is certain that Greg is a swan. It is probable that if Mary went to the office, or Greg is a swan, then Bernhard is a frog. There is almost no chance that if Greg is a swan, and Mary went to the office, then Sandra left the apple. We doubt that if either Julius is a rhino, or Greg is a swan, then Sumit is thirsty.
hypothesis: It is impossible that julius is a rhino, and Sumit is thirsty.
valid_hypothesis: It is impossible that julius is a rhino, and Sumit is thirsty.
invalid_hypothesis: There is a better than even chance that julius is a rhino, and Sumit is thirsty.
hypothesis_assertion: Julius is a rhino, and Sumit is thirsty.