context: It is improbable that John went to the garden. Chances are slight that Brian is yellow. It is improbable that Lily is green.
hypothesis: We doubt that either Brian is yellow, or Lily is green.
valid_hypothesis: We doubt that either Brian is yellow, or Lily is green.
invalid_hypothesis: It is certain that either Brian is yellow, or Lily is green.
hypothesis_assertion: Either Brian is yellow, or Lily is green.