Quote Originally Posted by Rocky

Again, not only are we born strongest in a certain part of the brain, but that area of the brain is where one of the functions lie. You can use the other functions, but as I stated in my first post, it feels unnatural to do this and everone would prefer to judge and perceive things in the way that seems most natural to them. The functions that you'd perfer to judge and perceive things with create your type.
Type or preferred tempament? It is completely possible to use any function available (just not at the same time for some like Fe + Te). Preference just refers to the ease of usage. It does not mean that usage is not possible.

I'll leave BT for later although I have my doubts for it. Hopefully I'll get to it before my vacation ends :/