context: We believe that Julius is a swan. Chances are about even that Mary went to the hallway. It is unlikely that Yann is tired. It is likely that if either Mary went to the hallway, or Yann is tired, then Sandra left the milk. It is probably not the case that if either Yann is tired, or Mary went to the hallway, then Greg is green. It is improbable that if either Julius is a swan, or Mary went to the hallway, then Fred is in the bedroom.
hypothesis: There is almost no chance that either Yann is tired, or Julius is a swan.
valid_hypothesis: It is probable that either Yann is tired, or Julius is a swan.
invalid_hypothesis: There is almost no chance that either Yann is tired, or Julius is a swan.
hypothesis_assertion: Either Yann is tired, or Julius is a swan.