{"id":"invert-tree-double-application-is-identity","text":"`invert_tree` is idempotent over two calls: `invert_tree(invert_tree(root))` restores the original tree structure.","truth_value":"IN","source":"entries/2026/06/06/invert-binary-tree-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"invert-tree-double-application-is-identity","truth_value":"IN","reason":"premise"}]}}