# XIII: The Deductive Process explained — Simon

> Chapter companion for Simon by J. Storer Clouston.

## What happens

Bisset presents a detailed plan of the library and shares his deductions about the murder, including the broken table leg, the position of the body, and the likely sequence of events. Ned Cromarty challenges his reasoning, pointing out that Bisset's own characteristics match the profile of the killer, leading to a moment of dark humor. Despite the flaws in Bisset's logic, Ned acknowledges some valid points and encourages him to continue investigating cautiously.

## Themes in this chapter

### Justice and Investigation

The chapter centers on Bisset's attempt to apply logical deduction to solve the murder, highlighting the investigative process and its pitfalls.

### Suspicion and Rumor

Bisset's reasoning inadvertently casts suspicion on himself, demonstrating how flawed deduction can lead to false accusations.

## Character check-ins

### James Bisset

Presents his deductive analysis of the murder scene, including a sketch plan and measurements, but inadvertently implicates himself.

### Ned Cromarty

Listens to Bisset's deductions, challenges his conclusions with sharp logic, and ultimately advises him to be more careful.

## Key lines

> the principle in a' these cases of crime and detection is noticing such sma' points of detail as escape the eye of the ordinar' observer, taking full and accurate measurements, making a plan with the principal sites carefully markit, and drawing, as it were, logical conclusions.

Bisset explains that solving crimes requires careful attention to small details, precise measurements, and logical reasoning.

_Bisset outlines his method of investigation._

> you just exclude what's not possible and what remains is the truth.

Bisset states that by eliminating impossible explanations, whatever remains must be the truth.

_Bisset articulates a classic deductive principle._

> I've proved it was mysel'!

Bisset realizes that his own deductions point to him as the murderer.

_Bisset's flawed logic leads to a self-incriminating conclusion._

## Links

- HTML: https://www.betterreads.online/discover/simon_se/chapters/xiii-the-deductive-process
- Book: https://www.betterreads.online/discover/simon_se
- All chapters: https://www.betterreads.online/discover/simon_se/chapters