This statement is not true because the PingAM tree designer enforces a Directed Acyclic Graph (DAG) structure. This means that creating loops, where a node's output path connects back to a preceding node in the same execution path, is explicitly prevented by the platform. This design constraint is crucial to avoid infinite loops during the authentication process, which would result in a denial of service for the user. While complex, branching logic is supported, cyclical paths are not.

A. This is true. Authentication trees must terminate, and they do so with "Success" or "Failure" nodes, or can redirect to another tree.

C. This is true. The tree designer is extensible and will display any correctly installed custom nodes or nodes from the Ping Identity Marketplace.

D. This is true. The "Inner Tree Evaluator" node is a standard component used to call and execute another tree as a modular part of the main flow.

1. Ping Identity Documentation, PingAM > Authenticate > "Journeys," Section "About authentication journeys," describes the flow and structure of trees, which inherently follow a DAG model without loops.

2. Ping Identity Documentation, PingAM > Authenticate > "Nodes," Section "Inner Tree Evaluator node," describes the functionality for integrating one tree within another.