So let me ask you a sort of related question, although not about ISFPs. Do you as an ENTP ever have trouble getting your thoughts across in a discussion? I often have a very interesting opinion I want to tell when co-workers debate, etc. But I get started expressing it and have trouble saying it in a way that makes sense to the other people. Or at least convincing them. lol. After making my point if they argue back theirs (which obviously I have reasons to disagree with), I have trouble explaining mine in a way to counter the argument. Usually if the other person is really opinionated too, I end up just getting quiet and basically saying ok, you win.