context: It is almost certain that Lily is a frog. It is certain that Bernhard is white. It is probably not the case that Greg is gray.
hypothesis: We doubt that either Greg is gray, or Bernhard is white.
valid_hypothesis: We believe that either Greg is gray, or Bernhard is white.
invalid_hypothesis: We doubt that either Greg is gray, or Bernhard is white.
hypothesis_assertion: Either Greg is gray, or Bernhard is white.