General question regarding workflow task allocation

Summary: We need a better understanding on what is meant by the following (see below)? Specifically, what is looked at to determine whether a task owner is available or not?

"When a task is allocated, the hierarchy followed is, it's first allocated to the task performer; If the performer isn't available, then it's assigned to the task owner, and if the task owner isn't available, it's allocated to the task initiator."

Content (required): https://docs.oracle.com/en/cloud/saas/human-resources/23b/faigh/when-does-a-checklist-task-get-allocated-to-the-task-initiator.html#s20068111

Version (include the version you are using, if applicable): 23A (11.13.23.01.0)

Code Snippet (add any code snippets that support your topic, if applicable):