this is goalpost shifting. i responded directly to things you said. you made a casual claim of most of stuttering being psychological. you were wrong. your claim isn't supported by any evidence. CBT and related approaches helping manage stuttering does not that "majority is psychological." the effectiveness of treatment does not determine etiology. you claim that without anxiety, "very negligible dysfluencies" remain, and this, too, is unsupported. you can use whatever techniques you want. that's completely fine. the issue is spreading misinformation. of course, science is a work in progress, but dismissing it while citing non-scientists as authorities is strange. it's quite concerning that this is coming from a "scientist in training." i hope you figure out how to make a logical argument.