A Rhino Practice, learned young and pursued off and on through life, is assessing one’s own performance on a range of topics.
Just like a Report Card. In this case, the Rhino in question is both the evaluator and the evaluated. Early on, Mom is likely to contribute to the process, but over time that contribution tapers off.
Mostly We get passing grades or better, but not always, sad to say. Ah, well.