{"id":"counter-before-scan-invariant","text":"The frequency map is fully built before the uniqueness scan begins; no character is evaluated against a partial count, ensuring \"unique\" means globally unique, not \"unseen so far.\"","truth_value":"IN","source":"entries/2026/06/06/first-unique-character-in-a-string-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"counter-before-scan-invariant","truth_value":"IN","reason":"premise"}]}}