What about a non-ariya individual who has learned the Buddha’s teachings — someone positioned between a puthujjana and a sotāpanna anugāmi?
You mentioned that such a person automatically enters the pūrana kamma stage but can stop the nava kamma stage through mindfulness.
Does this mean that, by being mindful, they can effectively avoid drifting further toward “Aniccaṁ vipariṇāmi aññathābhāvi”?