It's actually pretty accurate. In my experience, INTJ's state an answer that they have (probably!) intuitively leapt to using their external framework. They aren't keen on INTPs challenging it (because the INTP is seen as never wanting any final usable answer) but will welcome the new finding once it's been shown where they have made an error (if at all).
I get this quite a lot in my work environment (which is technically driven). INTJ makes a common sense intuitive leap to an answer and states it "coldly". This may or not be right - it's often given more severity of delivery than I feel is warranted (perhaps because I'm an INTP... ). I'll tend (as an INTP) to remember some disconnected fact that I bring to his attention, we then bounce this around for a while... the INTJ bringing subsequent facts and rules to my attention in a Te style logic framework, me bringing weird outside Ne style stuff to it, and hammering it down to a working fixed result. This, to me, is a classic INTP/INTJ interaction and highlights the differences between them!
It's quite interesting.. the INTJ is using Te against INTP Ne (so ideas are bouncing off logic) and then the INTJ is judging with Ni vs INTP Ti internally. Fun!