context: There is a better than even chance that Brian is gray. It is highly likely that John dropped the apple. It is highly unlikely that Lily is a lion. There is almost no chance that if Lily is a lion, or Brian is gray, then Julius is a swan. It is probably the case that if Brian is gray, or Lily is a lion, then Greg is a frog. It is certain that if John dropped the apple, and Brian is gray, then Bernhard is gray.
hypothesis: It is unlikely that either Greg is a frog, or Brian is gray.
valid_hypothesis: It is unlikely that either Greg is a frog, or Brian is gray.
invalid_hypothesis: It is probably the case that either Greg is a frog, or Brian is gray.
hypothesis_assertion: Either Greg is a frog, or Brian is gray.