I agree with it because I don't stutter at all when I talk aloud when I'm alone. Lately I'm focusing on my positive autosuggestions. Because I have the ability of influencing my brain with negative autosuggestions, I must also have the ability to instill positive autosuggestions in my brain 👍🤙. Also, here is a link on Andrey Denisenko on YouTube. I think he understands the psychology of stuttering well. https://m.youtube.com/c/Freefromstutter