C. Auguste Dupin discussing Dupin's method in the light of Charles Sanders Peirce's logic of making good guesses or "abductive reasoning," Nancy Harrowitz first quotes Poe's definition of analysis and then shows how "Poe the semiotician is running the gamut of possibilities here—inferences, reasoning backwards, visual, sensual and aural signs, reading faces. Playing cards with the man would have been an interesting experience." There is considerable controversy about the philosophical nature of Dupin's method. According to biographer Joseph Krutch, Dupin is portrayed as a dehumanized thinking machine, a man whose sole interest is in pure logic. However, Krutch has been accused elsewhere of
André Marie Jean Jacques Dupin "Principia Juris Civilis", 5 vols. (1806); "Mémoires et plaidoyers de 1800 au 1ier janvier 1830", in 20 vols.; and "Mémoires ou souvenirs du barreau", in 4 vols. (1855–1857). His brother, Pierre Charles François Dupin, was a mathematician. André Marie Jean Jacques Dupin André Marie Jean Jacques Dupin (1 February 17838 November 1865), commonly called Dupin the Elder, was a French advocate, president of the chamber of deputies and of the Legislative Assembly. Dupin was born at Varzy, in the Nièvre "département", in France. He was educated by his father, who was a lawyer of eminence, and at an early age