context: It is impossible that Greg is yellow. Chances are about even that Bernhard is a swan. Chances are about even that Sandra dropped the milk.
hypothesis: Chances are about even that greg is yellow, or Bernhard is a swan.
valid_hypothesis: Chances are about even that greg is yellow, or Bernhard is a swan.
invalid_hypothesis: It is impossible that greg is yellow, or Bernhard is a swan.
hypothesis_assertion: Greg is yellow, or Bernhard is a swan.