[I found this fascinating. There's quite a bit of narrative space here in terms of how you can relate it to storytelling no matter what your field of narrative endeavor. All of the folks talking about "changing your story" will likely have an affinity for this.]
McCaffrey was searching for a way to help people change the one story they had about a common object. For example, an electric plug’s intended function is to transmit electricity, but it also has a flat metal prong that could function as a screwdriver or paint scraper.