context: Chances are slight that Bernhard is a lion. It is improbable that Brian is a frog. It is unlikely that Julius is green.
hypothesis: It is certain that either Brian is a frog, or Bernhard is a lion.
valid_hypothesis: We doubt that either Brian is a frog, or Bernhard is a lion.
invalid_hypothesis: It is certain that either Brian is a frog, or Bernhard is a lion.
hypothesis_assertion: Either Brian is a frog, or Bernhard is a lion.