Semantic objections, such as the discreteness objection, argue that the human populations picked out in population-genetic research are not races and do not correspond to what "race" means in the United States. "The discreteness objection does not require there to be no genetic admixture in the human species in order for there to be US 'racial groups' ... rather ... what the objection claims is that membership in US racial groups is different from membership in continental populations. ... Thus, strictly speaking, Blacks are not identical to Africans, Whites are not identical to Eurasians, Asians are not identical to East Asians and so forth." Therefore, it could be argued that scientific research is not really about race.