premise: Messieurs, mesdames, said Poirot, with a flourish, "let me introduce you to the murderer, Mr. Alfred Inglethorp!" 164 Chapter 13 POIROT EXPLAINS "Poirot, you old villain," I said, "I've half a mind to strangle you! 
hypothesis: When Poirot introduced Mr. Alfred Inglethorp as the murderer to the audience, Mr. Inglethorp responds saying he wishes to strangle Poirot.