context: We believe that Brian is a swan. We believe that John moved to the office. It is probably the case that Bernhard is a frog.
hypothesis: Chances are slight that brian is a swan, and John moved to the office.
valid_hypothesis: There is a better than even chance that brian is a swan, and John moved to the office.
invalid_hypothesis: Chances are slight that brian is a swan, and John moved to the office.
hypothesis_assertion: Brian is a swan, and John moved to the office.