context: It is improbable that Greg is a swan. It is certain that John went to the garden. There is a very good chance that Bernhard is white.
hypothesis: It is probably the case that either John went to the garden, or Bernhard is white.
valid_hypothesis: We doubt that either John went to the garden, or Bernhard is white.
invalid_hypothesis: It is probably the case that either John went to the garden, or Bernhard is white.
hypothesis_assertion: Either John went to the garden, or Bernhard is white.