context: There is a very good chance that John went to the hallway. There is little chance that Lily is white. Chances are about even that Brian is gray.
hypothesis: Chances are about even that either Brian is gray, or Lily is white.
valid_hypothesis: Chances are about even that either Brian is gray, or Lily is white.
invalid_hypothesis: It is certain that either Brian is gray, or Lily is white.
hypothesis_assertion: Either Brian is gray, or Lily is white.