We don't usually frame it in terms of what _other_ people do. We try to figure out what the stutterer can do themselves to handle stuttering. I don't think it makes sense to ask - in a stuttering context - what another person can do to provoke stuttering, since we're instead focused on how to manage our stutter when it occurs. It'll be different depending on the stutterer and the situation. So, the way you're asking, I don't think it makes sense to answer. - *EDIT: Speech therapy is not about what you can do to defeat an opponent by making them stutter!...*