ISFJ, INSFJs - It'd be Ti, Ne, and Ti, Se respectively.
Many INTJs here identify with Fi as their tertiary function, especially when they do that test by Nardi.
Yet, if we observe the INFJs/ISFJs here... You'll see a mixture of individuals who identify strongly with Ti, and a mixture of individuals that identify more with Te instead in terms of preference and strength.
Maybe they haven't individualized these functions (Ti)? Yet, we're talking about individuals who are way past that stage of development that Jung suggested they'd be developed by. Something can't be right there. It's most likely the theory.
I only recently realised this little note on wikipedia:
This seems to be suggesting an that Si dominant individual, would actually be Si, Fe, Te, Ne as opposed to Si, Fe, Ti, Ne proposed by MBTI.Jung theorized that the dominant function acts alone in its preferred world: exterior for the extraverts, and interior for the introverts. The remaining three functions, he suggested, operate together in the opposite world. If the dominant cognitive function is introverted, the other functions are extraverted, and vice versa. The MBTI Manual summarizes references in Jung's work to the balance in psychological type as follows:
On a completely unrelated note: FREEDOM from talking about Jung. No more freaking essay till the next exam! =.=