context: Chances are about even that Brian is a frog. We doubt that Greg is gray. It is probable that Julius is gray.
hypothesis: There is little chance that either Greg is gray, or Julius is gray.
valid_hypothesis: There is a better than even chance that either Greg is gray, or Julius is gray.
invalid_hypothesis: There is little chance that either Greg is gray, or Julius is gray.
hypothesis_assertion: Either Greg is gray, or Julius is gray.