context: Chances are slight that Brian is white. It is impossible that Bernhard is gray. It is unlikely that Greg is a lion.
hypothesis: There is a very good chance that greg is a lion, or Bernhard is gray.
valid_hypothesis: It is unlikely that greg is a lion, or Bernhard is gray.
invalid_hypothesis: There is a very good chance that greg is a lion, or Bernhard is gray.
hypothesis_assertion: Greg is a lion, or Bernhard is gray.