context: It is almost certain that Julius is yellow. It is almost certain that Greg is a swan. It is probably the case that Lily is yellow.
hypothesis: We believe that either Greg is a swan, or Julius is yellow.
valid_hypothesis: It is improbable that either Greg is a swan, or Julius is yellow.
invalid_hypothesis: We believe that either Greg is a swan, or Julius is yellow.
hypothesis_assertion: Either Greg is a swan, or Julius is yellow.