context: It is almost certain that Greg is a swan. It is probably not the case that Bernhard is green. It is probable that Fred went to the bedroom.
hypothesis: Chances are slight that greg is a swan, and Fred went to the bedroom.
valid_hypothesis: It is probable that greg is a swan, and Fred went to the bedroom.
invalid_hypothesis: Chances are slight that greg is a swan, and Fred went to the bedroom.
hypothesis_assertion: Greg is a swan, and Fred went to the bedroom.