[gwern]

> The pure genotypes were obviously out-competed, surviving Europeans and (East?) Asians are descendants of hybrids.

Non-Neanderthal-descended-humans obviously weren't out-competed since they still exist, and because of all the evidence for harm from the Neanderthal variants which is why the variants are being selected against.

> Have you verified that you don't just happen to have a bunch of perfectly European genes that

Pretty sure. I trust 23andMe to get ancestry right for white people like me. And further, the genealogists in the family already knew about there being one Jew in the family tree who converted to Catholicism & married into the family about the right number of generations back; I had had no idea because I don't care about that sort of thing.