context: It is probably not the case that Brian is a swan. It is probably the case that Gertrude is a mouse. It is highly unlikely that Bill is in the school.
hypothesis: It is probably the case that bill is in the school, and Gertrude is a mouse.
valid_hypothesis: It is highly unlikely that bill is in the school, and Gertrude is a mouse.
invalid_hypothesis: It is probably the case that bill is in the school, and Gertrude is a mouse.
hypothesis_assertion: Bill is in the school, and Gertrude is a mouse.