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> This requires interviewing relatives, friends and acquaintances, collecting school and business records, drivers license records and any other public or private records.

We are talking about people born before 1910 here. Friends and acquaintances are all dead by definition. Drivers license won't come into play for decades. Other mid-life documents like marriage are also going to be decades later.

It's a hard problem. Especially when identity fraud for other reasons may be involved (a chield taking the identity of a parent to bypass inheritance taxes).

We need a biological test. Is there a biological marker that can attest of someone's age?




> Is there a biological marker that can attest of someone's age?

No, especially when you'd expect that the same qualities that might allow someone to live a very long time would also make them appear "biologically" younger. We don't have rings like trees.




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