Going back to Darwin's day, there were so-called codes of nomenclature which said if there's a conflict between… if there are several names available for a particular species, how do we select the correct one? And there was a reasonable agreement among people that if, for instance, a Frenchman and a Russian both described the same species at approximately the same time, the… the one who has published the earlier description, that name should prevail. But this was written into the rules in a very… firm… in… in a manner that… that left no leeway and eventually it was… this was called the Law of Strict Priority. And eventually some unscrupulous authors discovered if they would go to the early literature where names were quite uncertain, the early authors would reject a certain name because there was something wrong with it they thought, even though it was earlier, and the other name confirmed as established in the year 1802 and was valid… the valid name until 1936, then somebody found some odd old name in the literature and said, no, that now has to be the name. And, in fact, according to the rules it had to be the name, and so the nomenclature was totally upset and disturbed and the whole idea of nomenclature was to have a handle for information storage and retrieval, and this Law of Strict Priority was most disturbing.