There are several corollaries to the prime law of regenerative design durability and amplitude of reproducibility. Corollary A: The simpler, the more enduringly reproducible. Corollary B: The special-case realizations of a given design complex correlate as the more symmetrical, the more reproducible. Corollary C: There being limit cases of optimum symmetry and simplicity, there are simplicities of conceptual realization. The most enduringly reproducible design entities of Universe are those occurring at the min-max limits of simplicity and symmetry.