Descriptions Aren't Prescriptions
Farnam Street (Shane Parrish) · 2020
"A representation of reality (a map, a grammar book, a law, a mental model) can be read either descriptively (this is how things currently are) or prescriptively (this is how things must be) — confusing the two, especially when the description becomes outdated, causes real, avoidable problems."
A description tells you how something currently is (a snapshot); a prescription tells you how something should be (a rule to follow) — the same document (a grammar book, a map, a law, a corporate process doc) can start as an accurate description and, left unchanged while the underlying reality keeps evolving, quietly turn into an outdated prescription that people follow out of habit or authority rather than because it still fits the territory.
Graeber's 'grammar-book effect' names the exact mechanism: once a description is written down and taught in schools, people start treating it as the authoritative prescription rather than a snapshot of one moment in time, and any subsequent divergence between the living language (or process, or law) and the recorded rule gets blamed on the speakers/practitioners ('they're too lazy,' 'they're doing it wrong') rather than recognized as the rule itself having gone stale.
What is the 'grammar-book effect,' as described by David Graeber and cited in this piece?
Read more about the topic
The explanation above is written with AI assistance. These are the originals — go to them to check it.
- The Map is Not the TerritoryFarnam Street
- Descriptions Are Not PrescriptionsFarnam Street
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