context: It is probably the case that Brian is a swan. Chances are slight that Julius is yellow. It is certain that John went to the bedroom.
hypothesis: It is certain that john went to the bedroom, or Brian is a swan.
valid_hypothesis: It is certain that john went to the bedroom, or Brian is a swan.
invalid_hypothesis: It is impossible that john went to the bedroom, or Brian is a swan.
hypothesis_assertion: John went to the bedroom, or Brian is a swan.