context: It is certain that Mary got the football. It is probably not the case that Brian is white. It is probably the case that Greg is a swan. It is highly likely that if either Brian is white, or Greg is a swan, then Bill went to the cinema. There is a better than even chance that if either Mary got the football, or Greg is a swan, then John moved to the office. We doubt that if Greg is a swan, or Brian is white, then Winona is a mouse.
hypothesis: It is highly likely that brian is white, and Mary got the football.
valid_hypothesis: It is probably not the case that brian is white, and Mary got the football.
invalid_hypothesis: It is highly likely that brian is white, and Mary got the football.
hypothesis_assertion: Brian is white, and Mary got the football.