context: It is unlikely that Greg is gray. It is certain that Lily is a lion. There is a very good chance that Daniel grabbed the milk. It is probable that if either Daniel grabbed the milk, or Greg is gray, then Brian is a swan. It is unlikely that if Greg is gray, or Daniel grabbed the milk, then John got the apple. There is a better than even chance that if Greg is gray, or Daniel grabbed the milk, then Mary is in the garden.
hypothesis: There is little chance that either Lily is a lion, or Greg is gray.
valid_hypothesis: There is a very good chance that either Lily is a lion, or Greg is gray.
invalid_hypothesis: There is little chance that either Lily is a lion, or Greg is gray.
hypothesis_assertion: Either Lily is a lion, or Greg is gray.