I wonder about those cognitive functions tests. If you have Xi in your type makeup, those function tests will report you also using Xe but to a lesser degree. Likewise, if Xe is part of your type, the tests show you using Xi too but, again, to a lesser degree. Is it true?
As INTJ I'm happy to say I use Ni. Really happy. I like it. And I'm taken somewhat aback to learn I also use Ne. I think I don't. I think I have on tap what Ni's worked out in the past and Te/Se can deploy it or make use of it on the spot. My intuitions are as much "in the moment" as going back to my room and stewing for a while lets them be.
Or, for example, Ti. Do I use Ti at all? The function tests say I do. I wonder, however, if what really happens is something like, Te, when pressed, and with the aid of Ni itself, will go back over Ni inspirations and plot a path to them, and may even mock up a model that looks like categorisation and contradiction/framework checking. It'll look like Ti to the untrained eye, and if I'm anal enough about it, I may even fool an NTP. But I could do without such labour intensive rigour. I'd really prefer to say, hey, guys, check out this truth I found in the universal a priori.
Or, for example, currently the ENXPs are saying they use Se. And I'm like, ch'yuh, as if. They're really talking about Ne slimmed down in service of Si. Or something.
And so on.
Or my real example, Fe and Fi results. ENFPs and ENFJs usually get both Fi and Fe scores, and I think I doubt them. I think ENFP Fe scores are really Te expressions of Fi softened by Ne openness. And ENFJ Fi scores are really, I guess, Fe reactions to Ni/Ti discoveries.
Or maybe I don't think it. It's reductionist, perhaps unnecessarily so, and includes an assumption that if people are healthy and doing what they do best, then they're using their top four functions, and only their top four.
Counterpoint: the shadow.
If people are unable to use their top four to solve a problem facing them, they will have to resort to the shadow functions. This kind of stress may not be so uncommon. For example, the idea about about this INTJ using Ti... that's a duress situation of sorts. I actually wrote "when pressed". So maybe the shadow functions really are there as the function tests show.
So-o-o-... just being function-o-phobic or what?