{"id":"cousins-bfs-resets-per-level","text":"`isCousins` resets `x_parent` and `y_parent` to `None` at the start of each BFS level, ensuring it never falsely compares nodes found at different depths.","truth_value":"IN","source":"entries/2026/06/06/cousins-in-binary-tree-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"cousins-bfs-resets-per-level","truth_value":"IN","reason":"premise"}]}}