Cold Comfort

Re “Despite Skeptics and Critics, Cryonics May Be a Cool Way to Go,” Commentary, July 19: People who believe that a man who had died can be revived by cloning his cryonically preserved cells overlook the fact that the personality does not reside in the DNA. Identical twins are perfect clones of each other, yet they are not the same person and sometimes are exact opposites. When a body is cloned, the spiritual being inhabiting that body is not part of the package.

Michael O’Brien

Los Angeles