It was interesting in the thread about love languages, so many INTPs had physical intimacy as one of their top two.The only moment I have where I can truely let my emotions flow without Ti scrutinization is when being physically intimate.
My INTP is like this, it's amazing the deep passion that can become evident with physical expression. Incredibly overwhelming
I was referring more to situation's where he thinks he's being objective, and doesn't realize that the conclusion he's reached is being influenced by some emotional pull or bias he isn't conscious of.As for not admitting an opinion is based on subjective grounds, I think it's more that he doesn't want to 'submit' to a subjective opinion, right? When we lack the ability to have an opinion in that field based on solely objective grounds, yet our environment asks us to still have an opinion about it, things can get a bit tricky for us. We don't feel we have the right information yet to give a good opinion, and that can really tense us up.
I've learned to just go with it with an open mind. I can conform to a subjective idea if I have no better alternative at that moment, but I won't feel like that's truth or fact, and will allow myself to revise my opinion whenever I find something to add to the story.
As for situations that you described, where he's expected to have an opinion but he doesn't feel he has enough information, then he is as you describe: open minded, choosing the best with what info he has, but holding it lightly. This is his most common mind set.
I only brought up the other stuff because it sort of went with the thread (and I find it interesting )