gq: Contrary to the diffusionist theory, it appears that there was simultaneously a structural evolution towards the pointed arch, for the purpose of vaulting spaces of irregular plan, or to bring transverse vaults to the same height as diagonal vaults. This latter occurs at Durham Cathedral in the nave aisles in 1093. Pointed arches also occur extensively in Romanesque decorative blind arcading, where semi-circular arches overlap each other in a simple decorative pattern, and the points are accidental to the design.
Question: The use of the pointed arch for bringing transverse vaults to the same height diagonal ones, is in disagreement with what theory? Question: At which cathedral is the pointed arch used to match the heights of transverse and diagonal vaults? Question: In what type of decorative blind arcading are pointed arches common? Question: When semicircular arches overlap each other, what type of design is accidentally created?