context: There is almost no chance that Greg is a swan. It is highly unlikely that Bernhard is yellow. Chances are about even that Mary went to the bedroom.
hypothesis: It is highly unlikely that either Greg is a swan, or Mary went to the bedroom.
valid_hypothesis: Chances are about even that either Greg is a swan, or Mary went to the bedroom.
invalid_hypothesis: It is highly unlikely that either Greg is a swan, or Mary went to the bedroom.
hypothesis_assertion: Either Greg is a swan, or Mary went to the bedroom.