maybe it's more of an NTJ thing specifically, but the NFP in me can NOT stand the "well in my experience it's true, so it must be universally applied!" thing.
for example, a conversation i had with an ENTJ bestie last week:
ENTJ: OK well clearly i was wrong and bisexuality exists but i still think it only exists in women...when i tried the whole "bi" thing, i was really just covering up for being full blown gay and so was every other gay man i know.
Me: OK well what about the last 3 men i dated? they were all bisexual...
ENTJ: well they were exceptions.
Me: you're missing the point...bisexuality either exists in men or it doesn't. if they are "exceptions" then it still clearly exists in men.
ENTJ: the only bi men i ever knew were just gay, so there might be a few exceptions but OVERALL it doesn't exist in men.
Me: wtf that's stupid. do you hear what you're saying? and do you know every bisexual man in the world? what authority do you have to claim it doesn't exist based on your few experiences?
ENTJ: what authority do YOU have to claim it does?
Me: this is what i study, Justin. (talks about numerous journal articles and paper i've read on the subject)
ENTJ: well i still think they're all just gay deep down
Me:
Ugh, let's go eat.
Of course, I think he might be exaggerating the extent to which he actually believes this, but he does it anyway for...whatever reason. the sake of debate, getting under my skin, or both. With this particular ENTJ, he has the most respect for people who are willing to stand up to him by being just as much of an ass as he is, and since normally i'm the opposite he just LOOOVES to push my buttons and get me to prove i'm a big ass, too