The Foresight Institute suggests, among other sensible proposals, that the replication instructions for any nanodevice should be encrypted. Moreover, encrypted such that flipping a single bit of the encoded instructions will entirely scramble the decrypted output. If all nanodevices produced are precise molecular copies, and moreover, any mistakes on the assembly line are not heritable because the offspring got a digital copy of the original encrypted instructions for use in making grandchildren, then your nanodevices ain’t gonna be doin’ much evolving.

Eliezer Yudkowsky, No Evolutions for Corporations or Nanodevices, 17 November 2007

Added to diary 15 January 2018