context: It is impossible that Julie is in the bedroom. We believe that Mary got the apple. Chances are about even that Greg is a swan.
hypothesis: It is impossible that julie is in the bedroom, and Greg is a swan.
valid_hypothesis: It is impossible that julie is in the bedroom, and Greg is a swan.
invalid_hypothesis: It is likely that julie is in the bedroom, and Greg is a swan.
hypothesis_assertion: Julie is in the bedroom, and Greg is a swan.