I can't believe I read this entire thread. -_-
I personally think that too much focus has been placed on just NT. Being an NT is only half of it. You can be an NT, but the type of NT is also on how you experience reality, through perception or judgment.
As an INTP, while I do use NT to sort through things, a lot of it also depends on how I get to the starting point with Perception. Even if I was a J, my thought process would be pretty different.
Anyway, here's an example of an INTP's thought processes, brought on by Costrin's sig quote that the foundation of all humor is in truth or something like that.
Step 1:
Noticing the quote and thinking on it (P)
Step 2: Contemplation
1st layer thought: I don't think that's true.
2nd (Si): Stereotypes aren't really true, yet there are many humorous stereotypical jokes.
3rd (Fi, WTF, an INTP using Fi!?): I may just not want to accept that some stereotypes are based in reality since that goes against my value system, MOVING ON!
4th (Ne): Well, a dog jumping out of a car and then rolling around is funny, but is there a truth like that associated with the stereotype thing?
5th (Ti): Well, I suppose the "truth" is that it actually happened in reality.
6th (Ti): Well, if you want to argue from that point, then I suppose everything "truly" happens in reality, so I will concede that point.
Step 3: Doublecheck and (possible) Conclusion
I will, for now, say that since everything tends to be based in reality, which is objectively "true," Costrin can adequately defend that quote if I challenged him and he used that angle; however, the nature of truth is unstable and undefinable at best so the argument would get nowhere if I choose to argue semantics. -Route 1.
Step 4: Revision
Ideas(Ne) --> Conclusion(Ti) --> Route 2
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Note* If I happen to intuitively bring up a novel thought and rationalize it thoroughly enough to where I see it is impeccable, I could choose to accept it and give it inner value, influencing my perception of the world until it is proven wrong or until a better solution replaces it.
I think as an NT, I'm more open to the world throwing me a curveball and alternating my path than say, an ST (who is rigid) or an NF (who could be thrown out of equilibrium.)