context: It is probably the case that Brian is white. It is improbable that John went to the hallway. It is improbable that Bernhard is green. It is improbable that if John went to the hallway, and Bernhard is green, then Jessica is a wolf. It is almost certain that if Bernhard is green, or John went to the hallway, then Julius is a swan. It is probably not the case that if either Brian is white, or John went to the hallway, then Mary dropped the milk.
hypothesis: It is likely that either Julius is a swan, or Mary dropped the milk.
valid_hypothesis: It is probably not the case that either Julius is a swan, or Mary dropped the milk.
invalid_hypothesis: It is likely that either Julius is a swan, or Mary dropped the milk.
hypothesis_assertion: Either Julius is a swan, or Mary dropped the milk.