this post really confused me. all that you said makes me think of Ne... maybe I'm not an ENFP after all but an ISTJ WTF!?
I'm going to give this a try, but may accidentally venture into how the Ne-Si cycle feeds into one another, as I can have trouble separating them. This is the way it works for me, anyway:
One of the ways I feel it's presence is through knowledge and understanding of the world. It's not just a bunch of useful facts, it's a convergence of many layers of information and meaning onto each of those facts. Si tells me the world is full of signs and once you collect/absorb/retain them, even unconsciously, you have an endless reference text to consult. Nothing can really be strange, elusive or devoid of meaningful information. You just have to read the signs; let them speak to you, and it's familiar again.
To use an example, I went to a pub quiz (which I regularly go to), last night. In the music section you had to guess the singer based on a picture (with the face covered) and an audio interview with the artist. The answer wasn't immediately apparent but it was just a matter of mining the information we had.
The voice I didn't especially recognise but it sounded like youngish guy. In the photo you could see a little skin, enough to tell he's probably white (or relatively light in skin tone). You could also tell from the quality of the image that it was taken in relatively recent years. All of which is pretty generic information.
But the photo looked like this...
...which immediately made me think of this...
It brought to mind images and impressions of Sinatra, big band music, jazz crooners, fedora hats, the mid 20th century fashion, and a whole list of other bits of information - a sort of Ne free association of Si stored up facts. Putting all these things together starts to form a picture of the person in question.
This line of thinking turned out to spot on, as answer was Michael Buble.
When I mentioned the jacket and tie to my team afterwards, they thought it was bizarre that I would even notice them, let alone make that connection; and I suppose it was. I'm not a particular Sinatra or Big Band fan (although I do enjoy some), and I know next to nothing about fashion history, but some time or another I unconsciously stored up that picture and all the little things associated with it - and all that was enough.
Later, I thought it about this in relation to Si. I really love those little things stored away in my head without me even knowing it. I really love being able to draw on them to help make sense of what is happening now. It like the comfort of knowing I have all the clues I need to solve the puzzles of life, I just have to work out how to put them together correctly. Of course, there is always more to be learned; more information to collect - and the more I do, the overall picture becomes clearer and clearer.
I find that really cool, even if most people would think it lame and nerdy.