context: There is little chance that Bernhard is a swan. There is a very good chance that Jeff went to the hallway. It is highly unlikely that Brian is gray.
hypothesis: It is certain that brian is gray, or Bernhard is a swan.
valid_hypothesis: There is little chance that brian is gray, or Bernhard is a swan.
invalid_hypothesis: It is certain that brian is gray, or Bernhard is a swan.
hypothesis_assertion: Brian is gray, or Bernhard is a swan.