The description of as a dominant function, according to wikisocion, is as follows:
Okay, so you value logical accuracy and consistency. But surely you've experienced situations in which a belief of yours has contradicted the logical system you've created, right? If this does happen, what do you do to resolve the dissonance that arises due to the conflict between your belief and your existing logical system?The individual views reality through the lens of logic, immediately recognizing the correctness and appropriateness of things and their proper place in reality and in his system of views and behavior.
From an INFp's perspective, I think is a very empowering function and hope to develop it better, but instead of valuing and appreciating it for its own sake, I use it primarily to reinforce my existing, preferred beliefs. It's like, "here's what I believe (because of an emotion, personal experience, or "gut feeling"); now I need to find a logical justification for it." I need to stop doing that, haha. Do INTjs do this as well, or do you first figure out what is most logical and then develop your belief.
I'm sure it's a combination of personal experience and logic (and facts), because we all know that perfectly rational INTjs/ISTjs can arrive at radically different conclusions.