I know that it doesn't have to coincide mutually, but everything I've seen from him is a STRONG driving force just to mix everything together and get a working result that is logically coherent(or, in other words, to MAKE SENSE).
He also does it in such long ways that I can't see him as a xxxJ. He likes to leave the options open etc. Now, I do see him as an overly emotional INT(or INF pretending to be logical when it's only ad verbum of what he read). P and J are the made up things of MBTI and modern tosh anyhow. But if I hadto use them...P would be my answer like 10 / 10.
Finally, just compare him to reckful or some other INTJ's. Now do the same for INTP's. Well, if in reality a night's bright...well, it is bright! Otherwise what?