I don't know that it's totally resistant to change... but I can, with certainty, voice that I am currently an INTJ, have been an INTJ for as far back as I can reliably base my memories from (as I only learned about MBTI at 19 and I'm 21) and don't expect to change.
If we assume a base definition - directed from your insight - I think we can assemble an approximate model relative to your experience. It sounds like you strongly believe you are INTJ. From this, we can logically conclude you
don't believe you are anything else.
Taken further, this pattern could inflate the general ideals of all those who affirm their type as accurate. N cannot be S; E =/= I, etc.
Put simply, you are INTJ because you do not believe you are anything less.
Not that I'm necessarily challenging the validity of your assessment (or the collected evidence you use to bolster your conclusion (memories)), but do you think it possible you have artificially negotiated your experiences? A sort-of reverse engineering scheme, if you like. That is to say, is your taxonomy biased by your affection towards the INTJ standard?
What I'm really asking is how deeply we can be certain we logically divide bias from sincere representation. Yours is similar mine; mine to others...
I couldn't change my inner motivations into that of an ENFJ, but I mention a few times on these boards that I can be perceived as one in social interaction (because I've consciously worked hard to achieve their skills). However, I'm not motivated with the same inner pulls that all ENFJs are, my motivations are that of an INTJ (albeit a balanced one who grew up in a household full of Fs). I still like to be seen as competent and ingenious as opposed to the NF stuff, for example.
By implication, is the NF less likely to produce ingenious behavior? By whose measure is this reliable? Justification
for is secondary to the conceptual implementation
of the behavior.
I'm not picking on you. I'm trying to highlight the indistinguishable nuances we adhere to, consequent to our impressions of who we are.
Measuring these analytics to our MBTI further instills a sense of certainty as we can justify our application on the basis of credentialed research.
I don't know when personality is fully achieved. I have heard stories of me as a child that solidify me as an NT, but I also identify with the INxJ description of personality page for the kids personalities for a younger me.
Thank you for your detailed response. For what it's worth, I think you are INTJ.
In the end, my conclusions are unavoidably about myself. Personality is an extension of individuality and should be viewed as an organic entity, constantly open to revision as environment necessitates.
My bias is showing...