context: It is improbable that Lily is a lion. It is certain that John is in the office. Chances are about even that Brian is gray.
hypothesis: Chances are about even that either Brian is gray, or Lily is a lion.
valid_hypothesis: Chances are about even that either Brian is gray, or Lily is a lion.
invalid_hypothesis: It is certain that either Brian is gray, or Lily is a lion.
hypothesis_assertion: Either Brian is gray, or Lily is a lion.