August 18, 2009 1:43PM

The Future of DNA as an Identifier …

. . . is not in doubt. But as technology advances, it will not be as strong an identifier as it has been up to now. Scientists have demonstrated that they can fabricate it.

I wrote about the qualities of identifiers - fixity, distinctiveness, and permanence - in my book Identity Crisis. The ability to fabricate DNA renders it slightly less distinctive.