context: It is likely that John took the milk. It is unlikely that Brian is gray. It is probable that Julius is a rhino.
hypothesis: There is little chance that either Julius is a rhino, or Brian is gray.
valid_hypothesis: There is a better than even chance that either Julius is a rhino, or Brian is gray.
invalid_hypothesis: There is little chance that either Julius is a rhino, or Brian is gray.
hypothesis_assertion: Either Julius is a rhino, or Brian is gray.