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From: "Raymond Whritenour" <>
Subject: Re: [DNA] OT How many races are there?
Date: Sat, 20 Mar 2010 18:57:39 -0400
References: <4234a.6a12e693.38d2b71c@aol.com><BLU126-DS1116FCD0C524B9A8699569922C0@phx.gbl><FD550D35-E1A4-4B9E-B994-C97C9736DF91@vizachero.com><REME20100317205305@alum.mit.edu><BLU126-DS78BB86EB03D28062DDCC5922B0@phx.gbl><E1B7F2C6-9351-4004-B8D7-9900F5F9AEB3@vizachero.com><BLU126-DS12A9F670ADE3CF93C9CEC5922B0@phx.gbl><EDE161DE-8B3A-4262-96A7-12BA0FD11B54@vizachero.com><BLU126-DS1277532AD79C302AA7924B922B0@phx.gbl><2AAE732B-A666-4375-9CC8-619A2FBD0B32@vizachero.com><BLU126-DS11A44040F56C6978906383922A0@phx.gbl><48FBFC00-F38A-4DF3-A95D-A09F0EB9A1BA@vizachero.com>
In-Reply-To: <4234a.6a12e693.38d2b71c@aol.com><BLU126-DS1116FCD0C524B9A8699569922C0@phx.gbl><FD550D35-E1A4-4B9E-B994-C97C9736DF91@vizachero.com><REME20100317205305@alum.mit.edu><BLU126-DS78BB86EB03D28062DDCC5922B0@phx.gbl><E1B7F2C6-9351-4004-B8D7-9900F5F9AEB3@vizachero.com><BLU126-DS12A9F670ADE3CF93C9CEC5922B0@phx.gbl><EDE161DE-8B3A-4262-96A7-12BA0FD11B54@vizachero.com><BLU126-DS1277532AD79C302AA7924B922B0@phx.gbl><2AAE732B-A666-4375-9CC8-619A2FBD0B32@vizachero.com><BLU126-DS11A44040F56C6978906383922A0@phx.gbl><48FBFC00-F38A-4DF3-A95D-A09F0EB9A1BA@vizachero.com>


Vincent:

You can have the last word, since this will be my final post. k=4 may be an input, but the results it produces are an output. You can't make k=4 mean anything you want it to! If you could do that, there wouldn't be any point in doing the analysis! And, the results we see from the k=4 analysis coincide with historically earlier ideas of racial divisions--NOT with anyone's personal arbitrary social construct. When you can explain how the paper Ann linked shows 52 ethnic groups showing up, in the k=4 analysis, exactly where we would have placed them in the traditional 4-race scheme, then, you've won this debate. ("Coincidence" is not an acceptable answer.)

Ray Whritenour

----- Original Message -----
From: Vincent Vizachero<mailto:>
To: <mailto:>
Sent: Friday, March 19, 2010 6:20 PM
Subject: Re: [DNA] OT How many races are there?


There is a division at k=2, k=3, k=4, k=5, k=6, k=7, k=8 . . . .

When you run this sort of analysis, k is an input not an output. If
you choose k=4, then k=4.

The paper Ann linked clearly shows that you can make k equal whatever
you want (limited by the number of sampled populations, of course) and
you'll get a sensible output.

There is nothing special about k=4, except that it looks "right" to you.

VV



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