# scar (residual)

a permanently narrower window left by a past excursion of a parameter where the walls were forced beyond their usual boundaries.

- Computed level: L17 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: window ontology  ·  Arena: emergence theory

## Emergence
**Emerges from:** [window](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-window.range), [parameter](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-parameter.condition), [drift](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-drift.aimless), [wall](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-wall.range-end), [narrow](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-narrow.spatial), [past](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-past.temporal), [usual](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-usual.common), [leave](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-leave.movement), [boundary](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-boundary.limit), [force](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-force.push)

**Through:** an aimless drift pushes a parameter beyond its usual range boundaries, forcing walls apart and leaving a narrower window upon return.

**Novel properties:**
- permanently reduced range
- residual constriction
- asymmetric recovery

## Examples
- The San Andreas Fault remains a narrow fracture zone after tectonic forces pushed crustal blocks beyond their original alignment in 1857 and never returned. *(geology)*
- After the 2008 financial crisis, LIBOR rates settled into a narrower band than before, despite central bank interventions ending. *(economics)*
- The Chernobyl Exclusion Zone's radiation levels dropped but left a permanently restricted area 30 km wide, two decades after the meltdown. *(environment)*

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-scar.residual*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-scar.residual.json*  
*Every definition provably resolves to space, time, energy and pattern.*