context: Chances are about even that Bernhard is a frog. It is highly unlikely that John went to the garden. It is likely that Brian is a lion.
hypothesis: Chances are about even that either John went to the garden, or Bernhard is a frog.
valid_hypothesis: Chances are about even that either John went to the garden, or Bernhard is a frog.
invalid_hypothesis: It is certain that either John went to the garden, or Bernhard is a frog.
hypothesis_assertion: Either John went to the garden, or Bernhard is a frog.