# Longitudinal Person Model **Domain:** Personal Knowledge Representation / Continuity Architecture **Doc Type:** Canonical Concept Node **Maturity:** Emerging **Primary Source:** [[articles/The Art is Long|The Art is Long: Vespucci of Immortality]] **Related:** [[wiki/Personal Continuity Ontology|Personal Continuity Ontology]], [[wiki/Continuity Telemetry|Continuity Telemetry]], [[wiki/Psychological Continuity|Psychological Continuity]], [[wiki/State Sufficiency Problem|State Sufficiency Problem]] --- ## Definition A **longitudinal person model** is a representation built through sustained exposure to a person's language, decisions, relationships, memories, principles, and ways of perceiving, with the aim of preserving more than isolated records. ## Three Axes 1. **Long-duration acquisition** — the model is formed across time rather than from a single snapshot. 2. **Principle-level abstraction** — it attempts to represent characteristic patterns, not merely store documents. 3. **Post-biological queryability** — it can be interrogated after the source person can no longer answer. ## Evidentiary Boundary Behavioral resemblance or posthumous queryability does not establish subjective continuity. The model must be evaluated against [[wiki/Identity-Bearing Invariants|Identity-Bearing Invariants]], provenance, consent, and the [[wiki/State Sufficiency Problem|State Sufficiency Problem]].