I think it has something to do with some kind of anxiety triggering an issue that begins to throw us off. I caught myself recently in a small recording where I thought I stuttered on a random word but then watching the recording I noticed I oddly talked fast from the beginning It was very pronounced and seeing it from a third person perspective I could tell I was extremely susceptible from the get go, that it wasn't as random as I thought. I think I needed to slow my heart down so to speak. Not necessarily speak slowly but it seemed like I was starting to get adrenaline for no reason and it was about to build. Sometimes I notice just realizing I am going faster than I need to lets go of that susceptible state and I may be able to come back to a normal rhythm and feel totally fluent again. But during instances of pressure and so on, that seems to override anything. Also, especially lately, I have a really strong mindset again to not dwell on the worries of stuttering. I refuse inside to even consider it, it feels so unnecessary and that has been like a calming of the heart to me. Though I do not know of a sure fire cure, these instances and examples and their effects I can't ignore. When a state of mind can have such an impact (even if not always) or when slight changes to my frame of mind in the moment can have an impact, it seems to point to some kind of raised anxiety being the idea of why we stutter. Even in the smallest instances, I can feel or even hear myself being thrown off before I hit my first stutter and then that first stutter seems random but if you can hear a recording of yourself before the fact, you may notice the rhythm of speech already going off and quickened from the onset leaving a big susceptibility for it. It shouldn't be this way, people talk nervously all the time, and yet it seems to always manifest.