context: It is almost certain that John went to the bedroom. There is almost no chance that Mary put down the apple. It is probable that Julius is a frog. There is almost no chance that if Mary put down the apple, and John went to the bedroom, then Brian is green. It is unlikely that if Mary put down the apple, or John went to the bedroom, then Bernhard is a rhino. There is a very good chance that if Julius is a frog, or Mary put down the apple, then Bill dropped the milk.
hypothesis: We believe that bill dropped the milk, and Mary put down the apple.
valid_hypothesis: There is almost no chance that bill dropped the milk, and Mary put down the apple.
invalid_hypothesis: We believe that bill dropped the milk, and Mary put down the apple.
hypothesis_assertion: Bill dropped the milk, and Mary put down the apple.