# ground (level)

a parameter whose window is narrower than the windows of other parameters it sets, and whose value determines the walls for those others

- Computed level: L11 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: abstract-concepts-as-ranges  ·  Arena: emergent-levels

## Emergence
**Emerges from:** [parameter](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-parameter.condition), [window](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-window.range), [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), [others](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-others.distinct-entities), [sets](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-sets.grouped), [value](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-value.worth)

**Through:** The condition of a grouped set of distinct entities is maintained within bounds determined by a narrow range; the value of this range sets the walls for the ranges of the others in the set.

**Novel properties:**
- hierarchical constraint
- value-determined boundary
- asymmetric range limitation

## Examples
- The 5-volt regulation in a USB port sets voltage limits for connected devices, failing above 5.25V. *(engineering)*
- In a neuron, the resting membrane potential of -70mV gates ion channel behavior during signal transmission. *(biology)*
- The 2008 financial crisis reset the floor for credit default swaps, altering risk thresholds across derivatives markets. *(economics)*

## Used by
- [ivory tower](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-ivory-tower.detachment) (L12)

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