# Synthetic Intelligence
**Entity class:** Conceptual term
**Domain:** Artificial intelligence / biological computing / machine cognition
**Doc Type:** Developed Concept Node
**Maturity:** Developed
## Definition
**Synthetic intelligence** names intelligence assembled through engineered systems across digital, analog, neuromorphic, biological, robotic, and networked substrates. It emphasizes construction and composition where the institutional label [[wiki/Artificial Intelligence|Artificial Intelligence]] or the hardware-centered phrase [[wiki/Thinking Machine|Thinking Machine]] would be narrower.
## Historical Context
[[articles/A History of Machine Intelligence|A History of Machine Intelligence]] follows cognitive exteriorization from mechanisms and symbolic rules into electronic switching, adaptive hardware, software models, state networks, organoid systems, and infrastructure. This range makes synthetic intelligence a useful umbrella for systems in which the cognitive process is distributed across model, memory, sensor, interface, organization, and material substrate.
[[wiki/Substrate Intentionality|Substrate Intentionality]] adds the hardware question: whether a device was later recruited for intelligent systems or was designed and publicly described as a cognitive element. [[wiki/Machine Intelligence Intentionality|Machine Intelligence Intentionality]] records explicit objectives, while [[wiki/Coordination Ladder|Coordination Ladder]] measures their organizational concentration.
## Evidence Ledger
### Established
- Engineered cognitive functions now operate across several material substrates and hybrid assemblies.
- Historical programs explicitly pursued artificial or machine intelligence through both symbolic and neuron-inspired approaches.
### Strongly indicated
- Treating the model alone as the intelligent system understates the role of memory, sensors, energy, networks, interfaces, and human institutions.
### Plausible
- Hybrid biological-electronic systems may become a distinct synthetic-intelligence lineage rather than a peripheral technique.
### Unresolved
- Which synthetic systems possess morally relevant experience or personal continuity. Promotion requires evidence directed at experience and identity, beyond task performance or substrate similarity.
## Relationships
- **Overlaps with:** [[wiki/Artificial Intelligence|Artificial Intelligence]], [[wiki/Organoid Intelligence|Organoid Intelligence]], and [[wiki/Neuromorphic Computing|Neuromorphic Computing]].
- **Hardware framework:** [[wiki/Substrate Intentionality|Substrate Intentionality]].
- **Historical route:** [[wiki/Project X - Machine Intelligence History|Project X - Machine Intelligence History]].
- **Succession route:** [[collections/Machine Succession|Machine Succession]].
- **Source:** [[articles/A History of Machine Intelligence|A History of Machine Intelligence]].