No. It means it makes you look like you're T or lead Ti, but you're a feeler. In INTP, like me, who are quiet, it makes them look like sensors or ISTJ/ISFJ. It also makes ISFJ look like INTP or smart, but it's just tertiary Ti and not dominant.
I haven't finished Jung's collected works yet or theories on psychological types but it's more or less in there in some form, I'm sure. There's also some corroboration with my own field studies and work, in which most people here have absolutely none.
Well, I do seem perhaps like a Ti dominant type, but I put that down to my sub-type/modulation. I have NTJs in my family, and there's the cultural memes which encourage Ti over Fe in males, and discourage Ni generally. So I end up with a strong Ti.
There could then also be an INFJ who has stronger than usual Fe and seems like an ENFJ, or an INFJ who has stronger than usual Se and seems like some sort of sensor. I don't see a reason why INFJs would universally come across as T-like, although what I mentioned about Ti being the most neutral function in terms of energy probably plays into it.
So, INTP seeming Si dominant would be an Si sub-type/Si modulating INTP. An ISFJ seeming like an INTP would be the same deal, although they're then modulating to both of their lower conscious functions. Again, there could be Fe-heavy INTPs and so forth. But that would be rarer than Si sub-type and would occur primarily in females.
I don't think this would be in Jung's work, although the general typing of Jung as an INFJ compared with his self-typing as an introverted thinking type does corroborate with what you're saying, but imply that Jung was not aware of this. The other theorists of typology seem to say the odd merit-worthy thing, but there's a general lack of awareness and consensus over how this all plays out.
The sixth function is unconscious, but in my view is also the dominant function of a type's secondary type. I tried to emulate INFP cognition, which basically means becoming an INFP, and was able to do it fairly easily, but INFJ is the resting state. As the sixth function, this function is like the fifth but a bit more unconscious and a bit less energising. It arises naturally through use of the second function, as its unconscious complement, and is displayed through the second function being used in a manner similar to the third function.
I guess you could say that opposite functions are the same... but it would be better imo to say that they're opposing ends of a larger process. So, with Fe and Ti, the Fe wants to express itself through articulation that gels right with the intended audience, but part of this expressive process implies checking that each segment of the articulation holds up to logical scrutiny, i.e. the words don't simply
feel right, but they are
defined properly.
Similarly with Ni and Se - when in the mode of Ni, one is only peripherally aware of the concrete environment and cannot focus on it, instead living in the void between all phenomena, a kind of almost eerie quietness. When in Se, it is the void that becomes peripheral.
So each function
flips to its opposite,
calls on its inverse and is
completed by its parallel. Going from conscious to conscious, or unconscious to unconscious, means the energy switches from mode to mode to provide balance within that side of the mind, and going from conscious to unconscious, or unconscious to conscious, means a jump, wherein the conscious mind and the unconscious mind come to achieve balance - that which one carries out through intention, and that which is implied through the changes made.
