there are psychological, physiological, and neurological stutters, block, repetition, and prolongation stutters, childhood-onset, late-onset, or acquired stutters, stress-related, fatigue-related, and pervasive stutters, and temporary, permanent, and intermittent stutters. as well as many other adjectives I can't think of off the top of my head. they all sound different, can be treated in different ways, and have different life experiences attached. so yeah