context: Chances are slight that Brian is gray. It is likely that Greg is yellow. It is certain that John dropped the milk.
hypothesis: It is highly likely that either John dropped the milk, or Brian is gray.
valid_hypothesis: It is highly likely that either John dropped the milk, or Brian is gray.
invalid_hypothesis: It is probably not the case that either John dropped the milk, or Brian is gray.
hypothesis_assertion: Either John dropped the milk, or Brian is gray.