“提出这样一个观点很重要,即没有一个明确的原理是先验的,并且能使某种分类适用于任何人为的目的…… 制定某种分类的必要性和对此任意附加解释是最明显不过了……在历史上……为了作出种种区别陆续提出的这种必要性往往都是不固定的和不恰当的…… "It is important to come up with the idea that there is no clear principle that is a priori and that a taxonomy can be applied to any man-made purpose ... the need to devise a taxonomy and any additional explanation for it is the most obvious In history ... ... the necessity of putting forth various kinds of distinctions in the course of time has often been unfixed and inappropriate ...