context: We doubt that Winona is a mouse. Chances are about even that Brian is a swan. There is almost no chance that Lily is gray.
hypothesis: It is likely that lily is gray, and Brian is a swan.
valid_hypothesis: There is almost no chance that lily is gray, and Brian is a swan.
invalid_hypothesis: It is likely that lily is gray, and Brian is a swan.
hypothesis_assertion: Lily is gray, and Brian is a swan.