# Active
**Trait Number:** 8
**Layer:** Physical
**Bit Position:** 8
**Binary Encoding:** `00000001 00000000 00000000 00000000`
**UHT Code (self-encoding):** `01 00 00 00`
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# Icon
![[Active.png|200]]
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## Definition
The entity exhibits intrinsic or designed autonomous behavior, actively initiating or influencing its environment without requiring external prompts.
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## When to Apply
Use this trait when the entity:
- Demonstrates self-initiated activity or behavior
- Is intentionally designed or naturally structured to act independently
- Engages in interaction with its environment proactively
Avoid applying if the entity is:
- Completely passive, responding only to external stimuli or influence
- Merely a passive medium or substrate without autonomous action
- Defined solely by external or induced activity rather than inherent functionality
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## Examples
- Autonomous drone
- Robotic vacuum cleaner
- Self-driving car
- Biological organism
- Programmable thermostat
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## Commentary
The "Active" trait differentiates entities with self-directed, independent activity from passive or externally-driven entities. This trait is critical for categorizing systems with inherent dynamics, enabling precise distinction from purely responsive or passive elements.
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