The Sign of the Four

by Sir Arthur Conan Doyle

The Sign of the Four: Logos 1 key example

Definition of Logos

Logos, along with ethos and pathos, is one of the three "modes of persuasion" in rhetoric (the art of effective speaking or writing). Logos is an argument that appeals to... read full definition
Logos, along with ethos and pathos, is one of the three "modes of persuasion" in rhetoric (the art of effective speaking or writing). Logos is... read full definition
Logos, along with ethos and pathos, is one of the three "modes of persuasion" in rhetoric (the art of effective... read full definition
Chapter 1 — The Science of Deduction
Explanation and Analysis—Simplicity Itself!:

In Chapter 1, Doyle wastes no time introducing the reader to Holmes's penchant for deductive reasoning and obsession with rational decision-making. Holmes himself describes how he reaches his confounding conclusions with characteristic self-confidence, which he conveys through the use of hyperbole. Additionally, the moment is an example of logos and situational irony:

'It is simplicity itself,' he remarked, chuckling at my surprise—'so absurdly simple that an explanation is superfluous; and yet it may serve to define the limits of observation and of deduction.