context: There is a better than even chance that Bernhard is a swan. It is highly likely that Mary dropped the milk. It is probably not the case that Sandra took the football. It is unlikely that if Mary dropped the milk, and Bernhard is a swan, then Brian is green. There is almost no chance that if Sandra took the football, or Mary dropped the milk, then Greg is a rhino. There is almost no chance that if Sandra took the football, and Bernhard is a swan, then Fred went to the bedroom.
hypothesis: It is probably not the case that sandra took the football, or Fred went to the bedroom.
valid_hypothesis: It is probably not the case that sandra took the football, or Fred went to the bedroom.
invalid_hypothesis: There is a very good chance that sandra took the football, or Fred went to the bedroom.
hypothesis_assertion: Sandra took the football, or Fred went to the bedroom.