ENTP
I participated in the INTP forum for a couple of days once. Pure autism

Perhaps you were looking too hard for someone to reach a final conclusion. Not going to happen with an INTP. Actually, we INTPs are the most logical type. Unfortunately, our premise is liable to change when we gather more data.
I just re-took the test and it said INTP instead of INTJ as I had previously thought.
I was always bothered by the descriptions that said I was very organized and stuck to a plan. Perhaps when I took it I was thinking about money. But no, I'm never on time for anything.
Either way. I like to sit alone and stay inside and enjoy the world I create inside my head.
I have taken the test many times over the years. Sometimes, when I am particularly moody, I come off as an INFP. Sometimes, I'm in a more decisive mood and lean more toward an INTJ. The only two traits for me that are a constant are I and N.