Its real simple, but don't put a lot of weight on the order of the unconscious functions. Here's the order:
- If IP or EJ, this is a judging function, IJ or EP, this is a perceiving function. Orientation based on first letter.
- Opposite orientation of 1, opposite type of function
- Polar opposite of 2, opposing function
- Polar opposite of 1, opposing function
- Same function as 1, opposite orientation
- Same function as 2, opposite orientation
- Same function as 3, opposite orientation
- Same function as 4, opposite orientation
Like I said, real simple. This would suggest that our most unconscious function is introverted feeling, so let's go off topic and explore that for a second.
What does it mean to say that Fi is the function furthest from our consciousness? I don't really have an answer that I'm happy with for that, but I wonder if it might suggest the reason why we can become so irascible when someone attacks our base principles. I know that's one of the few things that can make me angry quickly (the other is being humiliated in competition, but that is more self-focused). I think it would be hard for me to describe exactly what my principles are, but I know that if someone violates them, I may write them off entirely. It can be a minefield to test the limits of my principles.
Does that sound similar to how anyone else feels? I'm not sure its exactly how I feel, but its 1am and I can't bother to proof read it
Oh, the actor question. No, I don't think they do. I think its more along the lines of how INTPs chameleon others unintentionally, except that they do it intentionally. The reason I don't think people can alter the order of their functions is precisely because what that order suggests. That most of what goes on in our brain is unconscious. You can't tell your unconscious self what to do. If you could, it you be called your conscious self.
On the order of development, I don't know. I think we'd have to do a study to learn anything about that, but I imagine that would be a terribly difficult experiment to set up. Still, it might be worth it

Should we try here? We have a pretty good sample group after all.