MBTI is personality types. While the test is self-measured, we have collectively been typing people for decades, including fictional characters, historical figures, etc.
YES you can add a cavaet, “While we can’t know for sure…” – that does not INVALIDATE the observations, especially when it’s COLLECTIVE over a long period of time with lots of people involved.
But here: – I’ll gladly add that cavaet:
“WHILE WE CAN’T KNOW FOR SURE, public observation over time consistently points to Greta MOST LIKELY being INTJ, taking into account all we know about her.”
Is that more politically correct?