```json { "table_name": "Iris", "table_type_tags": [ {"tag": "dimension", "confidence": 0.95} ], "primary_type": "dimension", "insufficient_evidence": false, "entity": { "columns": ["Id"], "unique_per_row": true }, "time_axis": null, "reasoning": "Id has Uniqueness 1.000 (150 unique values in 150 rows), establishing each row as a unique specimen. The four provenance columns (_ingestion_timestamp, _batch_id, _source_file, _source_system) are synthetic load-time metadata and carry no evidence. No natural time axis exists — the data records morphological measurements (sepal/petal dimensions) and species classification for individual iris flowers. Each row describes one specimen's attributes; there are no actions, state transitions, or temporal observations. Dimension." } ```