The poet wrote the sections as they occurred to him, and did not think of weaving them together into a single poem until it was too late to give them real coherency.
Because this leads to insupportable coherency strains, dislocations form in two directions at right angles on the surface of the albite lamellae.
The former comprised several dynasties of mixed Turki and Iranian race, but was wanting in coherency.
Another aspect of cache memories that has to be taken into account in sophisticated systems is cache coherency.