context: There is a very good chance that Greg is yellow. It is probably not the case that Fred moved to the cinema. It is probable that Brian is gray.
hypothesis: There is almost no chance that either Greg is yellow, or Brian is gray.
valid_hypothesis: Chances are about even that either Greg is yellow, or Brian is gray.
invalid_hypothesis: There is almost no chance that either Greg is yellow, or Brian is gray.
hypothesis_assertion: Either Greg is yellow, or Brian is gray.