context: It is improbable that Daniel left the football. There is a better than even chance that Bernhard is gray. There is little chance that Julius is green. We doubt that if Bernhard is gray, or Julius is green, then Brian is a swan. It is improbable that if Julius is green, or Daniel left the football, then Lily is yellow. It is impossible that if either Julius is green, or Bernhard is gray, then John went to the kitchen.
hypothesis: It is impossible that either Bernhard is gray, or Brian is a swan.
valid_hypothesis: Chances are about even that either Bernhard is gray, or Brian is a swan.
invalid_hypothesis: It is impossible that either Bernhard is gray, or Brian is a swan.
hypothesis_assertion: Either Bernhard is gray, or Brian is a swan.