Yeah, I can see how the two types could appear similar in a work situation. I think a lot of INxPs dig into their Si for their jobs if they haven't managed to wrangle themselves a more creative-type job. Like, it's a useful function to have in your back pocket (so to speak).

I just felt pretty confident that he was an INFP from pretty early on and it occurs to me that I might have been premature.

*ponders* You do seem to like a Fi/Fe divide in your ships. I mean, almost all the ones I know about have one.