{"id":"quadtree-no-remove","text":"Quadtree supports insert and query but has no removal operation, unlike GeohashIndex which supports O(1) removal via its dual-map design","truth_value":"IN","source":"entries/2026/06/05/proximity-service-proximity_service.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"quadtree-no-remove","truth_value":"IN","reason":"premise"}]}}