Final answer:
The statement is false; even if the "Leave Voicemail" node is set to "No Message", messages left by callers may still be recorded based on the voicemail system's configuration.
Step-by-step explanation:
The statement is false. In a dial plan, the "Leave Voicemail" node, when set to "No Message", typically means that the caller is not prompted to leave a message, but this does not necessarily imply that messages won't be saved if a caller leaves one. If a caller goes ahead and leaves a message anyway, it may still be recorded and saved depending on the system's configuration. It is important to understand the specific functionalities and settings of the voicemail system being used to know exactly how it will handle such situations.