原帖由 manstein 於 2007-11-2 05:26 PM 發表 
8 g" ^! z. \0 bAssume A is correct, den B is oso correct, therefore not the rite answertvb now,tvbnow,bttvb, h8 S& y, }6 I# a5 z
Assume B is correct, den assume A is lying, den the culprit is either A or D, den if D is oso lying, den the culprit is either ...  |