TN is the Theorist
MBTI is one theory. The Perseus 384 System is another. I am stopping my theory and moving out into the real world.
In the real world the letters can be rearranged according to your personal cognitive ability to shape-shift and to become a player other than your true self (if you care to do so?). Another point to bear in mind, in the real world of relationships, business dealings, violence and warfare, the letters are not calculated to a statistical norm but in the context of your social environment in relation to the attributes of the Others.
In the high brow intellectual, business and political T (thinking) world, the general public may seem like (Feeling) IDiots, fornicating and gambling (throwing money away) and Blowing Their Minds.