{"id":"reformat-tail-split-at-four","text":"When exactly 4 digits remain, they are split into two blocks of 2 (not 3+1 or a single 4).","truth_value":"IN","source":"entries/2026/06/06/reformat-phone-number-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"reformat-tail-split-at-four","truth_value":"IN","reason":"premise"}]}}