Q. Leach is adamant on this point: Pul Eliyan kinship is cognate rather than unilateral, a major point of difference from a system of hereditary moieties. In Pul Eliya, sidedness was a statistical tendency, not determined by a rule of descent. But Leach himself never perceived network sidedness that was implicit in his published genealogical data. White and Houseman, SIDEDNESS: 60 Million Strong?