context: We doubt that Mary went to the garden. Chances are about even that Lily is white. It is probable that Sandra got the football.
hypothesis: It is likely that lily is white, and Sandra got the football.
valid_hypothesis: It is probably not the case that lily is white, and Sandra got the football.
invalid_hypothesis: It is likely that lily is white, and Sandra got the football.
hypothesis_assertion: Lily is white, and Sandra got the football.