context: There is little chance that Greg is white. It is probable that Lily is a swan. There is a very good chance that Brian is gray.
hypothesis: It is almost certain that brian is gray, or Lily is a swan.
valid_hypothesis: It is almost certain that brian is gray, or Lily is a swan.
invalid_hypothesis: Chances are about even that brian is gray, or Lily is a swan.
hypothesis_assertion: Brian is gray, or Lily is a swan.