What two neuropsychologists told me is that maybe both, left and right side of the brain is developed at the same stage (usually, one is more developed) and so the brain is faster and tongue is slower so what you are saying the brain is thinking its already said so it cant follow But as I remember I saw a nightmare when i was 4 and since than I stutter, there was a time gap between 11-13 when i dont remember stuttering but now at the age of 22 i have it way worse cause of anxiety, stress and i always think that people are gonna judge me sooo