context: It is highly unlikely that Mary is in the school. It is highly unlikely that Julius is a rhino. It is certain that Lily is a frog. There is a very good chance that if Mary is in the school, and Julius is a rhino, then Jeff moved to the office. It is improbable that if Mary is in the school, or Julius is a rhino, then John went to the bedroom. It is highly likely that if Lily is a frog, or Julius is a rhino, then Brian is white.
hypothesis: It is impossible that john went to the bedroom, and Lily is a frog.
valid_hypothesis: It is impossible that john went to the bedroom, and Lily is a frog.
invalid_hypothesis: Chances are about even that john went to the bedroom, and Lily is a frog.
hypothesis_assertion: John went to the bedroom, and Lily is a frog.