英国人类学家尼达姆利用动物学关于“多重分类”的理论讨论社会事实分类，提出“家系类似性”的观点，具有重要的方法论意义，它使我们有可能摆脱社会科学“证实”或者“证伪”的争论，也有可能超越“社会科学”的”科学性”问题。也有可能帮助我们把“行政民族”和“学术族群”区分开来，并行不悖地加以使用，兼顾国家利益和学术规范． British anthropologist Niddam used the theory of “multi-classification” of zoology to discuss the categorization of social facts and put forward the view of “family similarity”, which is of important methodological significance. It makes it possible for us to get rid of “confirmation” or “ Fake ”argument, it is possible to go beyond the“ scientific ”issue of“ social sciences. ” It is also possible to help us to distinguish between “administrative ethnic” and “academic ethnic groups” and to use them in parallel, taking into consideration the national interests and academic norms.