Until he was dismissed amid great controversy, Hastings was considered one of the greatest intelligence agents of all time. It is clear that if his dismissal was justified, then Hastings was either incompetent or else disloyal. Soon after the dismissal, however, it was shown that he had never been incompetent. Thus, one is forced to conclude that Hastings must have been disloyal. Which one of the following states an assumption upon which the argument depends? ['If someone was disloyal or incompetent, then his dismissal was justified.', "Hastings's dismissal was justified.", 'The dismissal of anyone who was disloyal would be justified.', 'Anyone whose dismissal was justified was disloyal.']