I'm rather shamelessly arguing that Jung mistyped himself, and that he was an Ni thinker. And that his Se self-typing was simply based on the fact that he knew himself to be a natural scientist - his start and his end were both found in nature (human nature, his patients). He took up the data, built a theory on the data, and then applied it back to the "data."
However, what I'm saying is that, as a theory-builder, Jung had more than just Te going on. He searched externally for the possibilities in the data that enabled him to build his theory. But these possibilities - the functions - are not found in the data. They were his method for arranging the data systematically. Therefore I am describing the INTJ mentality.
There is definitely J-closure in building and creating a system, whether Kantian, Jungian, or Darwinian. P-non-closure (the playful theorist) never quite gets around to finishing it. The INTP prefers to juggle ideas endlessly. Some might argue that Kant was still creating before he died, and therefore he was an INTP, but that's only because he didn't live long enough to finish building the architectonic of pure reason. Theory-building is an INTJ trait.
Introverted Intuition Function
"Intuitive people process data through impressions, possibilities and meanings, so the Introverted Intuition function allows a person to have a sense about the future. It is the ability to grasp and get a sense of a pattern or plan. Information that is usually hard to understand and dissect is easily processed through Introverted Intuition."
The Ni function is obviously dependent upon having information to process - thus Jung's error in self-describing as Se.