{"id":"delete-duplicates-returns-same-head","text":"`delete_duplicates` always returns the exact same `head` object it received (or `None` for empty input); it never allocates or replaces the head node.","truth_value":"IN","source":"entries/2026/06/06/remove-duplicates-from-sorted-list-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"delete-duplicates-returns-same-head","truth_value":"IN","reason":"premise"}]}}