context: There is a better than even chance that Brian is gray. There is little chance that Julius is yellow. It is certain that Greg is a frog. There is a better than even chance that if Julius is yellow, and Greg is a frog, then Fred went to the garden. It is certain that if Julius is yellow, or Brian is gray, then Winona is a mouse. It is unlikely that if either Brian is gray, or Julius is yellow, then Sandra took the apple.
hypothesis: It is likely that either Winona is a mouse, or Brian is gray.
valid_hypothesis: It is highly unlikely that either Winona is a mouse, or Brian is gray.
invalid_hypothesis: It is likely that either Winona is a mouse, or Brian is gray.
hypothesis_assertion: Either Winona is a mouse, or Brian is gray.