context: Chances are slight that Bill went to the office. It is probably not the case that Greg is a swan. There is little chance that Julius is white.
hypothesis: It is probably not the case that either Greg is a swan, or Julius is white.
valid_hypothesis: It is probably not the case that either Greg is a swan, or Julius is white.
invalid_hypothesis: It is almost certain that either Greg is a swan, or Julius is white.
hypothesis_assertion: Either Greg is a swan, or Julius is white.