(1.) Syllogistically speaking, the major premise is this: A and B have been appointed to similar posts in two similar organisations; the minor premise: When disputed, A's appointment was upheld based on B's appointment; the conclusion: when conversely B's appointment is questioned, it should be upheld based on A's appointment.
(2.) That is logic, not law. Logical fallacy may not be fraught with dangerous consequences; a flaw in law or its interpretation is. For Justice Oliver Wendell Holmes Jr., the life of the law has not been logic: it has been experience.
(3.) To elaborate, I may observe that initially, A's appointment was questioned. He sustained his appointment showing that B was similarly appointed; thus, A's ppointment has attained finality. At a later point in time, however, B's appointment was questioned. Then B wanted to sustain his appointment because A's appointment was approved under identical circumstances--based on the very B's appointment. Now, B's contentions have fallen for consideration before this Court. A perfect loop of litigation providing no way out.