Now this cannot be, I just cannot believe it can happen to such great pilots. Around the world in bars, crew lounges and restaurants, I always hear pilots from those parts of the world swearing on their nans' graves that only they are such naturals with such inbuilt discipline that such things can never ever happen to them. Must be some date rape drugs or really super chronic fatigue or really lousy radar vectoring by SIN ATC that caused them to be distracted and disoriented.