context: There is a better than even chance that Greg is gray. It is probably the case that Brian is a swan. We doubt that Sandra took the football.
hypothesis: We doubt that brian is a swan, or Greg is gray.
valid_hypothesis: It is highly likely that brian is a swan, or Greg is gray.
invalid_hypothesis: We doubt that brian is a swan, or Greg is gray.
hypothesis_assertion: Brian is a swan, or Greg is gray.