The problem with stuttering is that the condition is so broad and the cases are so diverse that any generalization of that kind is bound to be incorrect. So of

The problem with stuttering is that the condition is so broad and the cases are so diverse that any generalization of that kind is bound to be incorrect. So of course there'll be cases of stutters who managed to achieve complete fluency in adulthood, as well as people who only began to stutter as adults.