Yet other categories reflect a range of types and sources of architectural knowledge. Another division distinguishes between architectural beliefs associated with creators and users. My experience of a built structure qua creator is perforce different than my experience of the same structure qua user, and the sorts of beliefs I arrive at may differ accordingly. As architect, Jones believes that an arch of one design but not another will keep the bridge up; as someone strolling underneath the bridge, Smith believes that an arch of a different design would have been a greater aesthetic success. This much accords with other artforms featuring practical functions. Further, architectural beliefs may differ by their technical or non-technical nature; by perspective and role of the belief-holder; or by facts about physical experience of the work or other modalities of belief acquisition.