context: It is probable that Brian is a swan. We believe that Julie is in the office. It is probable that Bernhard is white.
hypothesis: Chances are about even that either Brian is a swan, or Julie is in the office.
valid_hypothesis: Chances are about even that either Brian is a swan, or Julie is in the office.
invalid_hypothesis: It is highly unlikely that either Brian is a swan, or Julie is in the office.
hypothesis_assertion: Either Brian is a swan, or Julie is in the office.