Christopher McQuarrie? Charles Baudelaire? Kevin Spacey? Verbal Kint? Keyser Söze? John Wilkinson? William Ramsey? John Fletcher Hurst? Anonymous? Question for Quote Investigator: The 1995 movie “The Usual Suspects” contains a memorable line spoken by a guileful character about the existence or non-existence of the Devil. The greatest trick the Devil ever pulled was convincing the …