# healthy (condition)

inside the range of a parameter where the thing persists, and the work of keeping it there is less than the energy the thing produces.

- Computed level: L15 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: emergent  ·  Arena: system

## Emergence
**Emerges from:** [window](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-window.range), [maintenance](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-maintenance.upkeep), [parameter](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-parameter.condition), [energy](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-energy.capacity), [persist](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-persist.continue), [inside](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-inside.spatial), [keep](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-keep.maintenance), [range](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-range.spatial), [work](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-work.effort)

**Through:** The components together regulate a parameter within a viable range by exerting maintenance effort, where persistence requires less work than the energy available.

**Novel properties:**
- regulatory balance
- net energy surplus
- bounded resilience

## Examples
- The human body maintains blood pH around 7.4; deviations beyond 0.1 disrupt cellular function and demand corrective breathing or kidney action. *(biology)*
- The International Space Station's thermal control system keeps internal temperatures between 18°C and 27°C despite external swings from -150°C to 120°C. *(engineering)*
- The US Federal Reserve targets 2% annual inflation, adjusting interest rates to keep the economy within that range since 1990. *(economics)*

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