context: We believe that Julius is gray. It is probably the case that Daniel left the football. It is probably the case that Bernhard is a swan.
hypothesis: It is impossible that either Daniel left the football, or Bernhard is a swan.
valid_hypothesis: Chances are about even that either Daniel left the football, or Bernhard is a swan.
invalid_hypothesis: It is impossible that either Daniel left the football, or Bernhard is a swan.
hypothesis_assertion: Either Daniel left the football, or Bernhard is a swan.