context: It is unlikely that Bill is in the school. It is probably the case that Sandra got the football. It is unlikely that Brian is gray.
hypothesis: It is highly unlikely that bill is in the school, and Brian is gray.
valid_hypothesis: It is highly unlikely that bill is in the school, and Brian is gray.
invalid_hypothesis: We believe that bill is in the school, and Brian is gray.
hypothesis_assertion: Bill is in the school, and Brian is gray.