why, in finding the relations between one group and another, we summarily reject analogical or adaptive characters, and yet use these same characters within the limits of the same group.
zergatik uzten ditugun bazterrean gehiagokorik gabe, taldeen arteko loturak aztertzean, analogiazko edo moldaerazko ezaugarriak, baina gero zergatik erabiltzen ditugun, hala ere, talde beraren barruan.