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Incidently, the criteria in Method 1 is overly restrictive - the DNA segments do not have to be only from known descendants of the Target Ancestor. IMO, the DNA segments need only to be from the same "side", or parent, as the Targeted Ancestor. Jim Bartlett 20231203

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Correction - the segment Triangulation requirement to be overlapping segments from Matches on the same side refers to an individual tester. You are using multiple DNA testers... Once a TG segment has been confirmed back to the Target Ancestor, all DNA testers in that Triangulated Group can be painted to the Target Ancestor's DNA. Other TGs may or may not go back to the Target Ancestor. A Triangulated Group has always been construed to be overlapping segments on one side of the Test Takers DNA. Jim Bartlett 20231203


Very interesting blog post. I am trying to understand why there is such a different in the Triangulation methods for Method 1 and Method 2. IMO both methods produce valid Triangulated Groups. It finally dawned on me that some of the TGs in Method 1 are from closer MRCAs than the Targeted Ancestor. A closer MRCA *is* a descendant of the Targeted Ancestor, but the TG DNA segment could be from either of the MRCA's parents - not necessarily the Targeted Ancestor. Many of the segments shown in the DNA Painter picture would not be from the Targeted Ancestor. Jim Bartlett 20231203

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