He agrees with Joan Vincent's observation that (in Cohen's paraphrase) "Ethnicity... can be narrowed or broadened in boundary terms in relation to the specific needs of political mobilization.
Dane cumpu antuk panitenan  saking Joan Vincent inggihpunika (ring parafrase Cohen) "Soroh... dados kacutetang utawi kajimbarang yaning kaanutang antuk napi sane kabutang ring baga politik.