context: It is highly likely that Brian is a frog. Chances are about even that Julius is gray. We doubt that Mary dropped the milk. It is probably the case that if either Julius is gray, or Mary dropped the milk, then Gertrude is a wolf. We doubt that if Julius is gray, and Brian is a frog, then Bernhard is a lion. Chances are slight that if Mary dropped the milk, or Julius is gray, then Lily is a rhino.
hypothesis: It is unlikely that either Brian is a frog, or Lily is a rhino.
valid_hypothesis: It is highly likely that either Brian is a frog, or Lily is a rhino.
invalid_hypothesis: It is unlikely that either Brian is a frog, or Lily is a rhino.
hypothesis_assertion: Either Brian is a frog, or Lily is a rhino.