# Logical / Rule-based
**Trait Number:** 19
**Layer:** Abstract
**Bit Position:** 3 (bit 19 overall)
**Binary Encoding:** `00000000 00000000 00100000 00000000`
**UHT Code (self-encoding):** `00 00 20 00`
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# Icon
![[rule_governed.png|200]]
## Definition
The entity is structured according to **explicit logic, rules, formal constraints, or defined decision-making procedures**. It behaves or is interpreted through a system of logic.
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## When to Apply
Use this trait when the entity:
- Operates on the basis of **clearly defined rules or procedures**
- Embeds or expresses **formal structure or logic**
- Can be **evaluated or executed** through logic or inference
Avoid applying if the entity:
- Behaves **arbitrarily or without rule-like structure**
- Is based purely on **aesthetic, random, or passive form**
- Cannot be consistently predicted or interpreted logically
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## Examples
- A mathematical formula
- A software algorithm
- An access control policy
- A legal statute or clause
- A chess rule or strategy
- A configuration script or decision tree
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## Commentary
This trait marks entities that are **governed by logical structure** rather than physical causality or social norms.
Logic applies across domains — from **code and circuits to law and procedures**. This trait helps model control paths, abstract rules, and inference-capable components.
Not all logical things are intelligent or communicative. The essence here is **structural reasoning or constraint**.
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