context: It is unlikely that Bernhard is a swan. There is little chance that Brian is gray. It is highly unlikely that Sandra took the milk. Chances are about even that if either Bernhard is a swan, or Brian is gray, then Greg is white. There is a very good chance that if either Brian is gray, or Bernhard is a swan, then Mary went to the office. It is likely that if either Bernhard is a swan, or Brian is gray, then Lily is a rhino.
hypothesis: Chances are slight that either Bernhard is a swan, or Lily is a rhino.
valid_hypothesis: Chances are slight that either Bernhard is a swan, or Lily is a rhino.
invalid_hypothesis: It is almost certain that either Bernhard is a swan, or Lily is a rhino.
hypothesis_assertion: Either Bernhard is a swan, or Lily is a rhino.