context: Chances are about even that Sandra took the milk. There is almost no chance that Winona is a wolf. Chances are about even that Brian is gray. We believe that if Sandra took the milk, or Brian is gray, then John got the apple. It is highly likely that if either Sandra took the milk, or Brian is gray, then Julius is a swan. It is unlikely that if either Winona is a wolf, or Brian is gray, then Lily is a frog.
hypothesis: Chances are about even that winona is a wolf, or Brian is gray.
valid_hypothesis: Chances are about even that winona is a wolf, or Brian is gray.
invalid_hypothesis: It is almost certain that winona is a wolf, or Brian is gray.
hypothesis_assertion: Winona is a wolf, or Brian is gray.