These are the words that invite people to invent all kinds of things that was not there before. Yes, focusing on the person's words and symbols does create a focus on a single event, and to some extent explores the person's mental world, but it also invites creating things by that very focus. The symbolic domain, like all facets of consciousness, changes and transforms by the very accessing of it. All memories are like that. With every re-accessing of a memory, the memory will change.
All questions invites frames.
We do that in Meta-States as a way to elicit and flush out the frames we have around an experience. Whatever the person answers tells about his or her higher frames. Other questions invites pure invention. We do that in NLP all the time. They even have several diagrams that are similar to those we use in Mind-Lines.