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Ancestry has made a lot of noise recently when they updated their Ethnicity estimates, and the now intensified debate about the “accuracy of DNA tests” and the confusion among the general public makes it clear: as a community of serious researchers, we need to be the voice of reason when it comes genetic admixture and call it out for dubiously valuable, largely inaccurate parlor trick that it is. Here’s why:

Ethnicity cannot be tested for. Ever.

Ethnicity is a social construct. Period. If we look at any test, any genealogical tree or other determination it will not build a social link to ones ancestral background. Michael hasn’t been to Ireland, but I have, and…