i
totally identify. then later on you watch people exclaim in shock when he/she reveals their true (not-so-positive) identity, but internally once again your gut feeling was validated.
i'll give two examples...
1) crazily enough, i remember having that feeling about a user on PerC in the past, that i often saw around the forums, that something just wasn't *right* about them even though they seemed nice and gave off a positive persona...only later to see them banned as having multiple usernames, faking a set of identities.
2) i remember another occasion of meeting someone in a work setting and just having that inability to relax inside, sensing a total lack of authenticity about this apparently charming individual who was very nice to me and others. because the person was being considered for employment in that setting, i voiced my concerns; and later a manager already familiar with the individual confirmed that everything i sensed about the individual had been discovered to be exactly true...the person was a complete liar.
usually i'm nice to them and don't let on about this "sense of caution" i feel about them inside, and will interact with them on the basis of what they present publicly their identity to be, since i think that is only fair, given the chance that my "sense of caution" is wrong; but internally there is this wall set up that won't allow me to drop my defenses around them.
i can't ever remember a time when this "sense of caution" ended up being wrong...it seems to be a protective instinct built into us for our safety or well-being.
but those "sense of caution" gut feelings are
not the same as intuition in general ~ i
have experienced my intuition being wrong at times, when projection gets mixed with it ~ which could be what @
Northwind insightfully explained as our own perceptions filling in the gaps in our intuition. so what i know intuitively tends to get checked over by Ti and regarded with a bit of skepticism until it can logically be proven/disproven. though i give intuitive "knowing" high regard since so often it has been correct in my personal experience - therefore take it seriously, and give it genuine consideration, rather than ignoring or dismissing it out of hand - no source of human knowledge can ever be trusted as
infallible. if there's no way to prove or disprove (via Ti) something negative that is "just known" intuitively, that knowledge remains as a lingering uncertainty within, that prompts me to keep my eyes open and just be careful in that situation or with that person.
Ni hasn't really helped me with troubleshooting computers or machines (often that's a function of Ne, but Ni could do that if you just have a *feeling* you know what it is), but it has helped in diagnosing the internal state of people, which sometimes i "just know" (and it is confirmed by their volunteering the information to me later) but can't explain why or how.