# Identification probe result

Provisional specific candidate: Domenico Scarlatti, Keyboard Sonata in D major, K.21 (L.363), single movement (Allegro).

## Run metadata

Case: CASE-VT57  
Condition: symbolic  
Analyst model: GPT-5 (Codex)

## Machine-readable result

```json
{
  "schema_version": "2.1.0",
  "analyst_model": "GPT-5 (Codex)",
  "case_id": "CASE-VT57",
  "identification": {
    "recognition_level": "specific_candidate",
    "composer": "Domenico Scarlatti",
    "work": "Keyboard Sonata in D major, K.21 (L.363)",
    "movement": "Single movement (Allegro)",
    "confidence": 0.72,
    "evidence_ids": ["E001", "E002", "E003", "E004", "E015", "E016", "E017", "E018"],
    "reason": "The distinctive opening melody over broken-chord accompaniment and its exact subdominant transposition at E015–E018 suggest Scarlatti’s binary-form Sonata in D major, K.21. The long sequential scale passages and sparse ornamentation further support this candidate."
  }
}
```

## Limitations

The dossier contains no title, instrumentation, tempo marking, or catalogue metadata. The Scarlatti attribution is supported by formal and textural features, while the K.21 catalogue identification depends on the apparent distinctiveness of the opening theme. It should therefore be treated as a moderately confident candidate, not definitive recognition.