context: It is likely that Brian is gray. It is improbable that Mary dropped the milk. It is probably not the case that Julius is a rhino.
hypothesis: There is a better than even chance that mary dropped the milk, and Brian is gray.
valid_hypothesis: It is highly unlikely that mary dropped the milk, and Brian is gray.
invalid_hypothesis: There is a better than even chance that mary dropped the milk, and Brian is gray.
hypothesis_assertion: Mary dropped the milk, and Brian is gray.