Why say ISTJ life? What does it add to this analysis?Obey society's rules and don't stir up any trouble, don't express any weirld thoughts. The government want us to fix into nice little boxes.
If you meet someone who acts like that, you'll assume ISTJ,
If you meet someone who doesn't, you'll assume not ISTJ.
Therefore it's just equating surface behavior which is self-evident anyway with type, circular reasoning.
Like looking at the leaves moving in the wind, and assuming the wind blows because the leaves are moving.