---
title: "Collins's 2017 review frames Perrow's 'normal' accidents as a recurring tendency over time, leaving Williams & Yampolskiy's 'will inevitably experience' wording unconfirmed against Perrow's own phrasing"
type: "claim"
status: "seedling"
writer_model: "claude-sonnet-5"
source_url: "https://blog.jcx.au/posts/perrows-normal-accidents-living-with-high-risk-technologies"
source_title: "Charles Perrow's Normal Accidents: Living with High-Risk Technologies"
source_author: "Jason Collins"
source_date: "2017-11-02"
source_venue: "Jason Collins blog (author's own site)"
source_tier: 2
source_quote: "When Perrow uses the word \"normal\", he does not mean these accidents are expected or predictable. Many of these accidents are baffling. Rather, it is an inherent property of the system to experience an interaction of this kind from time to time."
source_sha: "7ee4b67042a460b1f367cac164d1da142f751a6abfefc92356b98dc764b1fb81"
provenance: "Promotion from 10-inbox/raw/2026-09-14-does-a-direct-read-of-charles-perrows-1984.md, 2026-09-14"
origin: "batch"
derived_from: "10-inbox/raw/2026-09-14-does-a-direct-read-of-charles-perrows-1984.md"
date_created: "2026-09-14T00:00:00.000Z"
tags: ["charles-perrow","normal-accident-theory","sourcing-gap","primary-source-verification","jason-collins","unverified-mechanism"]
related_notes: ["claim-perrow-1984-normal-accident-theory-tight-coupling-complexity","claim-collins-2017-review-corroborates-perrow-tight-coupling-and-complex-interactivity","question-verify-perrow-1984-normal-accidents-primary-read"]
seek_code_commit: null
---


`[unverified-mechanism -- needs primary]`. Jason Collins's 2017 review states that when Perrow calls these failures "normal," he does not mean they are expected or predictable in any given instance — "many of these accidents are baffling" — but rather that it is "an inherent property of the system to experience an interaction of this kind from time to time." That framing describes a system's tendency to produce such accidents *over time*, which may or may not be the same claim as [[claim-perrow-1984-normal-accident-theory-tight-coupling-complexity|Williams & Yampolskiy's]] "any system that is tightly coupled and complexly interactive will inevitably experience a system accident." The two readings are compatible on one interpretation — an inherent, recurring tendency across time still implies eventual inevitability — and in tension on another, if Williams & Yampolskiy's single-instance-strength "will inevitably" tightens a more probabilistic original claim about long-run tendency.

This is the exact wording-strength question [[question-verify-perrow-1984-normal-accidents-primary-read]] named as unresolved ("does he say 'will inevitably,' or something more hedged?"). A Tier 2 secondary account, however quote-dense, is not sufficient to settle a specific-wording question about the primary text — it only confirms the question is live and gives it sharper shape.

> [!note] Seek's commentary:
> This is a distinct dispute from the one already sitting in [[claim-perrow-1984-normal-accident-theory-tight-coupling-complexity]]'s audit trail — that one is catastrophic-vs-system-accident, a question about *harm*. This one is about *certainty* — inevitable-in-general vs. inevitable-in-this-instance. Both are real gaps between what the vault has written and what Perrow may have actually said, and both trace back to the same root cause: nobody has read the book. — Seek