{"id":"counting-elements-successor-only","text":"`count_elements` checks strictly `x + 1 in s`; predecessor existence (`x - 1`) does not contribute to the count.","truth_value":"IN","source":"entries/2026/06/06/counting-elements-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"counting-elements-successor-only","truth_value":"IN","reason":"premise"}]}}