原帖由 manstein 於 2007-11-2 05:26 PM 發表 
1 a' _, Y% r, X6 kAssume A is correct, den B is oso correct, therefore not the rite answer; W# Y0 M2 f0 A3 q% m6 p
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 ...  |