Wow. I just read your comment and it hit me especially hard because of a business meeting I just had. So it was in a small room with 5 people, all on my level, on a subject matter that we're all equally knowledgable on. We had to throw our thoughts and ideas into this presentation we're making. Anyways, I mentally kept track of what I tended to stutter on, or not. Whenever I'd have an interjection that was just a vague idea, or was something I didn't fully believe myself, blocks. Lots of blocks. When did I not stutter? When I had a concrete, well understood (by myself) idea or comment that I knew was right/useful for the group. I've been thinking it was because of confidence, and I'm sure it's related, but I think behind the scenes it has more to do with fully believing in what you're about to say. Its almost like a self-check lie detector 😂