The cognitive process that's often associated with INTP is Ne, not so much with Ni. Do you believe this, or is this just a bias associated with some of the tests were taking?
Consider come of the questions (possibly related to Ni) of the tests.
Do you think in a linear manner?
Well, I don't. My mind works forward, sometimes backwards. Heck, sometimes, it even pauses; zooms in, then zooms out, roates 360 degrees like the camera in the Matrix, but sure thing it doesn't necessarily mean that it doesn't understand linear. Judging things simply from a narrow tunneled cause and effect principle would be limiting.
Do you foresee visions of the future?
Hell no, I wouldn't be so damn arrogant and say that I'm a prophet, but as I've said, I do understand basic cause-and-effect, but not so much to audaciously say that I'm a visionary.
Well, it doesn't mean that if I'm not so much of a Te masochist, it doesn't necessarily mean that I don't understand implications. By Te logic, since it's the implementation function, it should be associated with Ni, which is the eventuality of the work of the Te, decided by the J function.
Come to think of it, being an INTP myself, which looks at various courses of actions, hence looking at gazillions of possible implications, wouldn't that mean that my Ni is considerably used to a certain extent?
Not to mention that being an INTP who sees implications in gray hues (unlike a polarized black and white in the J function), wouldn't that mean a more multi-faceted view of the Ni?