#A.6.P:5.2 — Episteme archetype: “the models are synced”

Preface node heading:a-6-p-5-2-episteme-archetype-the-models-are-synced:10959

#Content

Tell. A draft says: “The simulation model is synced with the physical twin.” Reviewers ask what “synced” means. The authors respond with examples, but downstream users still cannot tell whether the claim is about parameters, structure, calibration, evidence freshness, or mapping quality.

Show. Rewrite “synced” as an explicit correspondence relation kind + explicit qualifiers + witnesses:

entityMatchedBy(
  leftRef          = ModelRef(SimModel@ed=12),
  rightRef         = SystemRef(PhysicalTwin@ed=7),
  mappingArtifactRef = AlignmentModel_2025_11,
  scope            = ClaimScope{signals = S, metrics = M},
  Γ_time           = snapshot(t),
  referenceScheme  = RefScheme(CustomerIdRegistry#EU),
  viewpoint        = DataEngineeringViewpoint,
  witnesses        = {evalRunPins, calibrationPins, mappingArtifactPins}
)

Show (change narration). Two weeks later, the mapping artefact is replaced and the witness set is refreshed. In decision/publication lanes, represent this as a new edition and narrate the change via change classes (not via “re‑synced”):

withdrawRelation( relationRef = RelationRef(entityMatchedBy, leftRef, rightRef, ed=12) )

declareRelation(
  entityMatchedBy(
    leftRef           = ModelRef(SimModel@ed=12),
    rightRef          = SystemRef(PhysicalTwin@ed=7),
    mappingArtifactRef= AlignmentModel_2026_01,
    scope             = ClaimScope{signals = S, metrics = M},
    Γ_time           = snapshot(t₂),
    referenceScheme   = RefScheme(CustomerIdRegistry#EU),
    viewpoint         = DataEngineeringViewpoint,
    witnesses         = {evalRunPins_2026_01, calibrationPins_2026_01, mappingArtifactPins_2026_01}
  )
)

Show. Different “sync meanings” become different RelationKind tokens (e.g., entityMatchedBy, schemaAlignedUnder), not adjectives. Subsequent changes become narratable as retargetParticipant, rescope, retime, or refreshWitnesses, rather than “we updated the sync”.