I really liked this post, OA.
This is so close to being dead-on accurate. It only has one flaw, which you can see if you compare it to Si. Si references internally stored archetypes, too. However, Si doesn't CHOOSE them: they were created by experience.
Similarly, Ni doesn't "choose" the perspective it perceives, as much as it might seem like it to others. Rather, think of both Si and Ni as libraries of experiences. Si stores the concrete, literal versions of those experiences, but doesn't tend to keep functional/purpose/meaning-based attributes of it. Ni stores a more functional/purpose/meaning-based version of experiences, but tends to lose track of the concrete specifics.
Both Si and Ni can quickly pull up their respective libraries, and quickly rifle through the index to pull up the most relevant past experience.
I don't mean a conscious, rational choice. But no one is perceiving all things at all times. There is a focus on some info over other info, whether we make a conscious decision about it or not. Certainly, this may be arbitrary for the Pi-dom, and they may experience it as just being aware, with certain things standing out over others (and generally, that's what perceiving is, right? A mental awareness that "sees" things as just being, almost unquestionably so; it's not a reasoned out conclusion. This is easiest to understand with Se of course). However, there is bias in every function, and so the ego is "choosing" what is perceived and what is not, in order to sustain itself. I'm sure it does not feel like a choice or any judgment, but it can appear that way.
Pi doesn't exist with Je either, and the lines are not totally clear in reality. I think the J mindset is a combo of both Je and Pi, which is also why Ji is more part of a P mindset that judging in the way people think of Je. I was telling someone else in the "Ask an INFP" thread how as an INFP, I often deal with reality by responding to possibilities as they arise, so that I don't feel as if I am making decisions or applying value judgments at all. I understand how perceiving doesn't feel like it's choosing anything, but there is some filtering out going on.
This is super obvious in Si-dom, who tend to focus on a sliver of reality, gaining mastery over it, and at times extrapolating from it to claim a grasp of all of reality (all introverts do this in some way, IMO). Their ego is limiting themselves to this sliver so as to not be threatened. It seems to me that Ni types can become quite narrow also, and this is when they can mistakenly apply their perceptions to something novel, making their intuitions dead wrong. The risk for the Pe type is opposite - to stay shallow, to jump from one thing to the next, because going too deep might prove to threaten the ego.
So what Ni does is look at reality, e.g., at a problem, and immediately sees "what kind of problem" it is, pulls out the Ni-experience that relates to it, and it is nigh-instantly solved. (Just as if you'd asked Si about a fact, and the Si individual immediately recites the correct fact to you.)
Ni doesn't remember facts. It remembers how to solve "that kind of problem" in a very abstract way. As you might notice, putting "that kind of problem" into more concrete terms is very difficult.
But there is judgment inherent in that, even if it's not reasoned out but just "appears" as something obvious, as clear as the sky is blue. Still, there is a judgment of relevancy. Perhaps this is the influence of Je, but there is a filtering, and that to me is a choice of the ego (even if not a rational one for perceiving types).
You are going to have more of an understanding of Ne than I do, but I don't think Ne chooses a perspective either.
Certainly not consciously. Instead, some things loom with more potential than others. Possibilties seem to "emerge" on their own. You just become aware of them. They fascinate you. Etc... But I would be silly not to acknowledge that this is only a part of reality I choose to focus on, even if that choice is not conscious. Being aware that we, on some level, are choosing, is pretty powerful. It removes some of the grip of the ego, and that's also when we are able to appreciate that others are seeing and evaluating reality from stances that are just as valid.
Perhaps the difference is that you are judging dom and I am perceiving dom? You always end up choosing what you look at and how you look at it, perhaps? A blindness of Ni doms is that we don't really feel like we're "choosing" anything, that it's just there, but it probably looks like a "choice" to others.
Well of course I am a Ji-dom, but no, I don't consciously choose what I perceive that much either. The judgement for me comes more in the response, as I noted above. I generally feel as though I am just responding to reality as it unfolds. There's more of a helplessness there as an IxxP than with an ExxP, who seem to shape things as they unfold more. Ne-dom sort of merge with potential much as Se-dom do with objects they are manipulating (as if it were an extension of their body). My response is governed by an ideal model Fi has pre-constructed, which doesn't feel much like judgement either so much as recognizing what does or could resemble it (conceptually, not literally). Je-dom seem much more deliberate and to actually experience a categorical judgment.
Again, the notion of "whatever it is they want it to be" is off. This is how it looks to others, not to oneself. What you are experiencing perhaps from other Ni types is that they appear to want to change whatever it is you believe to be true, and you're immediate thought is likely, "But that's reality. You don't get to change that."
The reality is that they see a different reality than you do. They're looking at a different set of interconnections that you don't readily see, just as you see interconnections that Ni doms don't readily see.
I agree with this....and that's related to what I'm saying above about the ego. When you realize the "reality" you see is not the whole of reality, then you know that you are "choosing" it on some level.
I don't experience that with Ni-dom. People don't try and change what I believe to be true because I don't offer that up easily. Most of the time, people don't understand my premise, which is common for any introvert (being that its sourced internally and requires you to bring forth the same thing within someone vs offering external "proof"). What I experience with them is refusal to see a different perspective when they've "decided" that a certain one is the reality, and it often appears to be an interpretation that removes responsibility or error on their part. Of course, that is more common with INFJs, who are the Ni-dom I am usually complaining about

.
Ni doms don't "choose" that perspective that they apply. It's what they see. It is their reality. AND they don't often realize that other people don't look at the world that way. Self-awareness for an INTJ is when we realize that no, we aren't that smart, but rather we simply don't look at the world the way everyone else seems to. Most people don't look at the world and see a complex system of cause-and-effect that can be altered in fundamental ways. One surprise for me was that what most people view as static, I see as entirely flexible and changeable. Conversely, what most people view as flexible and changeable I see as almost-immutable law, e.g., analogous to the laws of physics.
Interesting perspective, here. I think what you are encountering is the different visions of the world, again, which see different kinds of things as mutable/immutable.
Quick and dirty function-theory version: To Ne/Si, the concrete is immutable, the abstract is mutable. To Ni/Se, the abstract is immutable, the concrete is mutable.
More likely, circumstances changed (Se is mutable) which drew up a different Ni-experience-model-abstraction. To you, it looks like they just totally changed their mind, and don't even remember that you had just proven them wrong, for example. What really happened is that you believe there is only one context (Si is immutable), therefore the Ni dom just did a 180-degree logical reversal.
My ENFP ex and I had some really weird arguments along these lines early in our relationship, until after an explanation of mine she realized, "Hey, waitaminute! You changed context. You're not even talking about what I'm talking about now!" To which I replied, "Yes. Exactly. Why wasn't that obvious before?"
You might wonder how that fits into Ni being immutable. Ni is still immutable because the old context didn't just disappear. It still exists in abstract, but doesn't apply now in the concrete instance. If the context switched back, you'd hear the same arguments as before the original switch. Further, there can be kind of a "chaos theory" kind of effect: a slight change in circumstances can produce a radically different conclusion even when maintaining the same Ni-understanding. Physics and math are full of things like this, where the math doesn't change at all, but a slightly different input value produces a significantly different result.
I understand this concept because Fi is much more like this, which is why it can appear inconsistent to others. It's highly dependent on context and not a fixed set of values as its erroneously made out to be (not unless you really funnel it down to those fundamental concepts which are not even able to communicate, as once they are given form, they are now dependent on something specific). I think that's the nature of introversion also, but depending on your function, it. Of course, it seems more natural to me that judgment is context specific rather than perspective, but I also see multiple perspectives in any context (so that I don't find the Ni perspective wrong usually, just not the only one, and I only want it acknowledged that other possibilities
exist). I suppose they need to switch contexts for this, but I know there is a paradoxical aspect to Ni, and I guess that's acknowledging several contexts simultaneously (?).
For me, Si is experiences as extremely negative or very frivolous (Feeling like the past reality is a pattern I cannot escape - I am doomed! Experiencing the sensory world romantically- everything is imbued with meaning, as if it has a personality), so that consciously I don't experience it enough as "me" to be able to explain it as if I own it. Both Pi functions are the hardest for me to grasp.
As for [MENTION=5999]PeaceBaby[/MENTION] 's example, I will not see the table as a concept in itself, but I will see it as embodying an idea that is more like a personality. Sure, physically, it's a table, but it can take on a different "attitude" depending on context. Of course, there is also the metaphorical aspect too - the table is less a symbol than able to be used as a parallel for something unrelated on the surface. It annoys the crap out of actual SJs if they can't see the parallels. For NFPs, this tends to come out poetically more than practically, but you also use it to adapt quickly to new contexts.