context: Chances are slight that Julius is a swan. It is unlikely that Greg is a swan. It is improbable that Mary moved to the garden.
hypothesis: It is likely that either Julius is a swan, or Mary moved to the garden.
valid_hypothesis: We doubt that either Julius is a swan, or Mary moved to the garden.
invalid_hypothesis: It is likely that either Julius is a swan, or Mary moved to the garden.
hypothesis_assertion: Either Julius is a swan, or Mary moved to the garden.