context: It is almost certain that Brian is white. There is a better than even chance that Greg is a frog. It is unlikely that John dropped the milk.
hypothesis: We doubt that john dropped the milk, and Brian is white.
valid_hypothesis: We doubt that john dropped the milk, and Brian is white.
invalid_hypothesis: It is highly likely that john dropped the milk, and Brian is white.
hypothesis_assertion: John dropped the milk, and Brian is white.