I have an ancestry DNA match that I'm hoping to use to confirm a relationship with my great-great-grandmother. However, the wording of the DNA confirmation help page has me slightly confused. It says:
"If you know the relationship to be third cousins or closer through traditional genealogy, and the match at AncestryDNA in the "3RD COUSIN" group or closer...."
I know my match to be a half 1C2R; sharing 51 cM over 3 segments. Looking at the DNA painter utility for estimating relationships based on shared CM, there is a 7.19% chance that a relationship with this amount of DNA would be 1C2R, which is low, but still possible. However, the match estimate at ancestry is that we are 4th cousins, not third.
Is this a relationship that I can mark as "confirmed with DNA" without triangulating? Or do I need to triangulate given Ancestry's "further than third cousin" estimate?
