context: It is highly likely that Greg is yellow. It is almost certain that Bernhard is white. There is almost no chance that Brian is a swan.
hypothesis: Chances are slight that either Brian is a swan, or Bernhard is white.
valid_hypothesis: It is almost certain that either Brian is a swan, or Bernhard is white.
invalid_hypothesis: Chances are slight that either Brian is a swan, or Bernhard is white.
hypothesis_assertion: Either Brian is a swan, or Bernhard is white.