{"id":"hills-valleys-dedup-eliminates-plateaus","text":"After deduplication, `deduped[i] != deduped[i+1]` for all valid `i`, guaranteeing every interior element is unambiguously a hill, valley, or neither — plateau cases cannot occur.","truth_value":"IN","source":"entries/2026/06/06/count-hills-and-valleys-in-an-array-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"hills-valleys-dedup-eliminates-plateaus","truth_value":"IN","reason":"premise"}]}}