{"id":"two-sum-no-self-pair","text":"An element cannot pair with itself; the lookup-before-insert order prevents `seen[num]` from matching the current index","truth_value":"IN","source":"entries/2026/06/06/two-sum-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"two-sum-no-self-pair","truth_value":"IN","reason":"premise"}]}}