context: It is almost certain that Julius is gray. It is improbable that Sandra grabbed the milk. It is unlikely that Greg is a swan.
hypothesis: It is improbable that either Julius is gray, or Greg is a swan.
valid_hypothesis: We believe that either Julius is gray, or Greg is a swan.
invalid_hypothesis: It is improbable that either Julius is gray, or Greg is a swan.
hypothesis_assertion: Either Julius is gray, or Greg is a swan.