context: There is little chance that Greg is gray. We doubt that Bernhard is a swan. It is impossible that Julius is green. It is almost certain that if either Bernhard is a swan, or Julius is green, then Fred went to the hallway. We doubt that if Bernhard is a swan, or Julius is green, then Mary dropped the milk. It is almost certain that if Julius is green, or Bernhard is a swan, then John moved to the garden.
hypothesis: It is unlikely that either Bernhard is a swan, or Mary dropped the milk.
valid_hypothesis: It is unlikely that either Bernhard is a swan, or Mary dropped the milk.
invalid_hypothesis: It is probably the case that either Bernhard is a swan, or Mary dropped the milk.
hypothesis_assertion: Either Bernhard is a swan, or Mary dropped the milk.