Archiver > GENEALOGY-DNA > 2010-02 > 1266303801

From: "Lancaster-Boon" <>
Subject: [DNA] TMRCA assessments
Date: Tue, 16 Feb 2010 08:03:21 +0100

Dear Anatole

You wrote to Ken:-

>When a person uses a celestial mechanics for description of movements of
planets and other celestial objects, he does not need to know when and how
those object formed, and other irrelevant (in that context) issues. The
person knows that his equations and calculations work and give him an


>When you DO know that the system is described as a first-order dataset, and
it passes the necessary verifications, you treat it as a plain system, and
the margin of error is relatively small.

So the above makes it all the more interesting to those of us who want to
understand what you are saying, just exactly how you know when you are
dealing with a "first order dataset" and how you define a first order

Is there any other objective criteria other than that your linear and
logarithmic methods will agree in such cases?

Best Regards

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