I do agree that you are correct in that often we are just NeTe-ing our way along. But If the introverted element was Fi, would you be able to sense it?
This will trigger your BS sensor, but I'd ask you to at least consider it a bit...
The INFPs often use Fi to judge aesthetics, not morals or values. Moving further, many ENFPs decsribe "groping", "feeling", or reaching out kinesthetically to dervie the best answer to technical or analytical problems. @noigmn specifically described using this in physics, I note it in troubleshooting technical issues with instrumentation. It feels like touching the subject at hand from a very high level-30,000 ft. You close your eyes, look at the problem in your mind, and then touch it with your hand while looking away from it (all in your mind of course). You explore the problem, the complex mesh, the conditions with a very visceral approach-I feel it in my stomach. Eventully you find a lump. The lump is the crux of the problem. It is where all the parts are intertangled. That is the answer to the technial problem.
This visceral feeling is exactly like facing a values based delimma-the same visceral lump is felt, but there isnt any sadness or emo, just visceral groping, like a blind person touching an object.
This all sounds like crazy bullshit-except that it works very, very well in troubleshooting scientific instrumentation. I cant tell you why the problem is the problem, in a detailed step by step sense, but I am pretty certain it is the correct problem. I dont think it is NeTe-that seems to happen without the viseral component.
My point (I really do have one, in spite of the babble), is that I think this is on way we can use Fi. Fi isnt simply a feelings based judgement for values, but an analytical tool that can be applied to other items. I suspect it fails if applied to pure logic, Ti is far more applicable, but using Fi this way works pretty well on insanely sloppy problems.
Now assuming any of the above babble could be true, would an NeTe solution or a vsiceral NeFiTe solution look the same from your perspective?