When you opened the thread, you apparently weren't sure yourself of his type. The only introverted thinker you wouldn't countenance is INTP, you wouldn't even put it on the table (despite your own intuitions that he might in fact be one).
The fact you were prepared to consider ISTP suggests that you had not ruled out a Ti Dom at that point, despite your subsequent insistence that he has no Ti. Honestly, reading you now it looks like the only reason you won't agree with the emerging consensus about his type is because you consider INTPs to be deficient, and you admire this fellow : ergo, he can't be INTP. Even if you had a hitherto-fore faultless rep for accurate type-readings, that logic isn't going to impress anyone.
All of your arguments stem from misunderstanding or prejudice.
INTPs can't have ideals.
INTPs can't be vague (with Ne aux, seriously?)
Where he does something INTPish that doesn't make sense to you, you just call him a liar:
You know him better than he knows himself right? Because he thinks he's a P but you KNOW he's not.
If you are going to rely on intuitions and your own interpretation of events, rather than accept what he is saying on face value, you can twist anything to look like anything.
Yet in spite of your claimed affinity, you don't seem to understand the man/where he is coming from at all:
However, you did get something right: