context: It is unlikely that Gertrude is a cat. We doubt that John got the milk. It is unlikely that Yann is tired. It is probably not the case that if Yann is tired, and Gertrude is a cat, then Lily is a swan. It is improbable that if either John got the milk, or Gertrude is a cat, then Julius is a rhino. It is almost certain that if Gertrude is a cat, or John got the milk, then Brian is gray.
hypothesis: It is highly unlikely that either Julius is a rhino, or Lily is a swan.
valid_hypothesis: It is highly unlikely that either Julius is a rhino, or Lily is a swan.
invalid_hypothesis: There is a very good chance that either Julius is a rhino, or Lily is a swan.
hypothesis_assertion: Either Julius is a rhino, or Lily is a swan.