Убийство в Восточном экспрессе

           Iselecteachpassengerinturn,considertheirevidenceandsaytomyself,‘Ifsoandsoislying,onwhatpointaretheylyingandwhatisthereasonforthelie?’AndIansweriftheyarelying—if,youmark—itcouldonlybeforsuchareasonandonsuchapoint.WehavedonethatonceverysuccessfullywithCountessAndrenyi.Weshallnowproceedtotrythesamemethodonseveralotherpersons.”

           “Andsupposing,myfriend,thatyourguesshappenstobewrong?”

           “Thenoneperson,atanyrate,willbecompletelyfreedfromsuspicion.”

           “Ah!Aprocessofelimination.”

           “Exactly.”

           “Andwhodowetacklenext?”

           “Wearegoingtotacklethatpukkasahib,ColonelArbuthnot.”