```json { "reason": "The column holds category labels from a closed set of 6 distinct values. Each cell names one primary app category that a person uses before bed; the slash-separated pieces (e.g., 'Instagram / Reddit') are alternative names for a single category, not separate values. Splitting on the slash would fragment one measurement into parts that are not interchangeable members of a set—'Instagram' alone is not a valid bedtime app category in this schema, and reordering 'Instagram / Reddit' to 'Reddit / Instagram' yields the same category. The column name 'primary_bedtime_app' (singular) and the closed vocabulary of exactly 6 values confirm this is a single categorical variable per row.", "verdict": "single_value", "encoding": null, "separator": null, "confidence": 0.98 } ```