I can effortlessly see how both might relate to these. The INTP part comes from my use of what I think is Ti. I recognize I've been doing it most recently because I've been going through a difficult time trying to revise my understanding of Myers Briggs objectively and really learning the proper implications and definitions so I can see how I fit and don't fit against the criteria of each type. I can't think straight and I bam my head into the wall trying to put up a good understanding on the logic of the subject. However, others say what I'm recognizing as Ti may be a critical parent shadow function of the INTJ. My INTJ understanding on the other hand, is that I work on a basic refining of my person and theories I enjoy like parallel universes and chaos effects (Ni). My Ne is weaker than my Ni which may explain why I don't believe I am an INTP as I can't relate to the idea of searching for knowledge or exploration. Some have suggested I'm an INTJ suffering from cognitive loop and an "in need of development of my auxiliary function (Te).Apparently my need to change myself and the way I go about it can be described as an Ni-Fi loop. I see what can get me to be a better person that is ideal for what I want and can change my values based on that, but I often sometimes circumvent any action related to that. This usually makes me angry and leads me to feel like I'm never making progress and see another way to refine myself to be better and do the same thing. I'm also terrible at using Fe harmony and its given me less friends over the years and left me feeling pretty alone.
If there is anything you want to know, I'll answer questions.