How Dead Is a Doornail?

by Mike Dubik, MD Brian Wood, MD For hundreds,...  ...ruth has been expressed in the phrase: "dead as a doornail ." Thus, someone who is unequivocally dead is said...  ...ho is unequivocally dead is said to be "dead as a doornail ." Advanced life support technology now allows...  ...eria against the widel...

http://www.neatorama.com/2012/01/17/how-dead-is-a-doornail/