I do not understand this “DNA is not 100% accurate” thing.
There are three types of DNA testing: Autosomal (atDNA), mitochondrial (mtDNA), and Y-Chromosome (y-DNA) testing. The three types reveal different information and the apparent ‘accuracy’ of each testing types differs with one another.
atDNA testing can be taken by anyone and tests all ancestry. The results from this type of test may tell you that you are 60% Northern European, 20% East Asian, 10% African, and 10% Southern European.
People genetic ancestry differs from their full ancestry however so the results, although accurate, do not always leave a holistic picture. By this I mean that while everyone has 16 great-great-grandparents you may only have genetic markers from some of them. In other words, with the same results as above one may have small amounts of Native American ancestry but it would not show genetic markers in their test results.
I guess this is what people mean when they say that they do not trust results.
mtDNA testing looks at DNA inside the mitochondria and only tests one line: your mothers, mothers, mother, etc.
y-DNA testing looks at the male sex chromosome and only test one line: your fathers, fathers, father, etc. y-DNA Haplogroups often share surnames as they share the same patrilineal ancestor. These tests are incredibly accurate and if two people share a line within something like 20 generations they will have almost identical results.
Due to the migration of the human population out of Africa and into Europe, Middle East, Asia, Australia, and finally over the Bering Straight and into the Americas – African and Native American y-DNA varies more than many other groups.
All Ailstocks that have taken y-DNA tests and made their results public have had the same result – an African haplogroup not a Native American haplogroup. This means that if their family tree is correct back to Absalom Ailstock then his father could not have been Cornstalk or any other Shawnee person. They may have been part Native American but not on their paternal line. They may even be related to Cornstalk but he was not their father, paternal grandfather, or paternal uncle.
It seems to me that a long, long time ago this mulatto family decided to attach itself to a famous person (Chief Cornstalk) because their names rhymed.
Geoff