▁the ▁qual ities ▁of ▁struct ural ▁thinking . ▁Even ▁though ▁Lé vi - St ra uss ▁frequently ▁speak s ▁of ▁tre ating ▁culture ▁as ▁the ▁product ▁of ▁the ▁ax i oms ▁and ▁cor oll aries ▁that ▁under lie ▁it , ▁or ▁the ▁ph on em ic ▁differences ▁that ▁const itute ▁it , ▁he ▁is ▁concerned ▁with ▁the ▁objective ▁data ▁of ▁field ▁research . ▁He ▁notes ▁that ▁it ▁is ▁log ically ▁possible ▁for ▁a ▁different ▁atom ▁of ▁kin ship ▁structure ▁to ▁exist – s ister , ▁sister ' s ▁brother , ▁brother ' s ▁wife , ▁daughter – but ▁there ▁are ▁no ▁real - world ▁examples ▁of ▁relationships ▁that ▁can ▁be ▁derived ▁from ▁that ▁grouping . ▁The ▁trouble ▁with ▁this ▁view ▁has ▁been ▁shown ▁by ▁the ▁Australian ▁anth rop ologist ▁August us ▁El kin , ▁who ▁ins isted ▁on ▁the ▁point ▁that ▁in ▁a ▁four ▁class ▁marriage ▁system , ▁the ▁preferred ▁marriage ▁was ▁with ▁a ▁classific atory ▁mother ' ▁s ▁brother ' s ▁daughter ▁and ▁never ▁with ▁the ▁true ▁one . ▁Lé vi - St ra uss ' s ▁atom ▁of ▁kin ship ▁structure ▁de als ▁only ▁with ▁cons angu ine al ▁kin . ▁There ▁is ▁a ▁big ▁difference ▁between ▁the ▁two ▁situations , ▁in ▁that ▁the ▁kin ship ▁structure ▁involving ▁the ▁classific atory ▁kin ▁relations ▁allows ▁for ▁the ▁building ▁of ▁a ▁system ▁which ▁can ▁bring ▁together ▁thousands ▁of ▁people . ▁Lé vi - St ra uss ' s ▁atom ▁of ▁kin ship ▁stops ▁working ▁once ▁the ▁true ▁Mo Br Da ▁is ▁missing .