Identity Crisis

Identical twins are not, of course, literally identical, but now it seems that they aren't genetically identical either thanks to "tiny differences" that are "relatively common" and "could have a major impact on our understanding of genetically determined disorders." I suppose, then, that we ought to just call them "very similar twins" which somehow or other reminds me that I haven't had a look at Reasons and Persons in a while.

This article available online at:

http://www.theatlantic.com/politics/archive/2008/02/identity-crisis/48583/