>how would you explain people who learn to speak, develop a stutter at roughly age 3 As I suspect it is a physiological issue within the nervous system (a nerve under biomechanical stress) it would be perfectly within reason to have a child develop a stutter as they grow and age. It would also be perfectly within reason to have the stutter disappear if the physiological factors change so as to relieve the physical stress. >continue as a severe stutterer until roughly age 26, then achieve fluency via speech therapy Why would it be odd to have speech therapy be effective for something that is caused by a physiological nerve issue? Physical therapy is effective even though it does not surgically resolve the root issue in all cases, many of them nerve related issues. >consuming alcohol in my teens, I achieved perfect fluency for a few hours That sounds interesting, this and many other factors with regards to stuttering should be further studied in a professional clinical environment. I personally don't remember alcohol affecting my stuttering. Please don't think I'm advocating for pseudo-science treatments or reliance on sketchy science. I simply think that this nerve has been overlooked with regards to stuttering. You still haven't acknowledge that thousands upon thousands of SLPs and millions of trained medical professionals throughout the entire world have yet to agree upon the specific cause of stuttering. It seems to me there is a need for answers. I am boldly stating that the left recurrent laryngeal nerve is of interest with regards to stuttering. I am going to see that it is investigated in a clinical setting.