Summary

In "The Murders in the Rue Morgue," Edgar Allan Poe presents a detective story centered on the principle that solving an apparently insoluble mystery requires focusing on what is unusual rather than what is ordinary. The narrator’s companion, C. Auguste Dupin, argues that the police have failed because they are confounded by the "outré character" of the crime—the superhuman strength, brutal ferocity, and grotesque disorder—and have fallen into the "gross but common error of confounding the unusual with the abstruse." Dupin insists that "it is by these deviations from the plane of the ordinary, that reason feels its way" toward the truth, and that investigators should ask not "what has occurred," but "what has occurred that has never occurred before."

The story demonstrates how logical deduction, applied to seemingly bizarre details (such as the impossibility of the windows being opened, the motive-less butchery, and the voice foreign to all nations), can unravel a mystery that baffles conventional police methods. Readers take away a model of reasoning that values improbable coincidences and abnormal features as clues, rather than obstacles. The tale also introduces the concept of "ratiocination," where the solution’s apparent insolubility is directly proportional to the ease with which it can be solved once the correct perspective is adopted.

Key concepts

  • Outré characterThe bizarre, abnormal features of a crime that, contrary to police assumptions, make it easier to solve because they deviate from the ordinary.
  • Confounding the unusual with the abstruseThe common error of mistaking something strange for something inherently difficult or incomprehensible.
  • Theory of probabilitiesA framework for evaluating coincidences, which Dupin uses to dismiss the police’s mistaken focus on the delivery of money as a motive.
  • Deviations from the plane of the ordinaryThe principle that reason finds its way to truth by examining what is abnormal or unprecedented in a case.
  • RatiocinationThe process of logical reasoning that Dupin applies, where the apparent insolubility of a mystery is in direct ratio to the ease of its solution.

From the book

Title: The Murders in the Rue Morgue by Edgar Allan Poe← Descent into the Maelstrom The Works of the Late Edgar Allan Poe (1850) by Edgar Allan Poe The Murders in the Rue Morgue The Mystery of Marie Roget → 2082222 The Works of the Late Edgar Allan Poe (1850) — The Murders in the Rue Morgue Edgar Allan Poe ​ THE MURDERS IN THE RUE MORGUE. What song the Syrens sang, or what name Achilles assumed when he hid himself among women, although puzzling questions, are not beyond all conjecture. Sir Thomas Browne. The mental features discoursed of as the analytical, are, in themselves, but little susceptible of analysis. We appreciate them only in their effects. We know of them, among other things, that they are always to their possessor, when inordinately possessed, a source of the liveliest…

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