No, I'm not making any such assumptions. We all know that people don't typically use Ne and Ni together; the way the letters combine is actually the only thing that pretty much all socionists agree on.
What I'm saying is that the way that you're defining Ni and Ne (and others too...you're not the only one) makes it obvious that they would be used together. It's obvious if you think about it that it's so...that if Ni were equivalent to skill in picking the best idea, and Ne were equivalent to coming up with the ideas in the first place, then they would be complementary; they would go hand in hand.
In other words, this statement:
....which I agree with, contradicts your earlier statement. It wouldn't make sense that people who come up with ideas ignore the need to be able to judge between them. Their ideas would have no coherence and they would get nothing done, if that were the case. And if there weren't any people who are good at judging between ideas (Ni in your system) but who also had ideas to judge in the first place, then we wouldn't have anyone to evaluate ideas, which would of course be a great loss.
...now of course, there are people who focus more on the judging side of things...but typically we call such types rational types, rather than Ni.
very true...Ti complements Fe, and Fi complements Te. That's just standard Socionics.
But if you define X as judging which of a series of ideas is the best one, or the most relevant, according to some criteria, is that not a judging function? So if X = Ni, then Ni is a judging function (not in reality...just according to how you've defined it).