Yes I think you are right, in that, young children can be corrected faster. I think this might be partly due to their strong cognitive interference when they grow older (when their neocortex is fully developed), and thus, where the neocortex (our conscious control) conflicts with the evaluations of the basal ganglia. Your thoughts? Yes I agree what you said about it being difficult to check whether it's temporary or permanent. Stuttering recovery is usually considered prolonged periods of stutter-free speech, typically beyond **4 to 5 years**, are recommended before labeling an individual as recovered to ensure stability and avoid relapses. *(*Howell, S. Davis, S. M. Williams*)* Some scholars advocate for a 5-year fluent period as a stronger indicator to rule out relapse risks. *(Source: "Recovery from Stuttering," Howell, 2011)*. At least 4–5 years of sustained fluency *(Yairi & Ambrose).*