A naturalist, struck with a parallelism of this nature, by arbitrarily raising or sinking the value of the groups in several classes (and all our experience shows that their valuation is as yet arbitrary), could easily extend the parallelism over a wide range; and thus the septenary, quinary, quaternary and ternary classifications have probably arisen.
Erraz gerta liteke naturalista batek, horrelako paralelismoren bat ikustean txunditurik, paralelismoa askoz urrunago eramatea, klase ezberdinetako taldeen balioa nahierara goratuz zein beheratuz-eta gure esperientzia osoak erakusten digu haien balioespena gaurdaino arbitrarioa dela-;