Couldn't getting sick be considered crashing? We obviously have a lot of redundancy (10^12 cells) so we don't "crash" unless a lot of those cells get sick. In

Couldn't getting sick be considered crashing? We obviously have a lot of redundancy (10^12 cells) so we don't "crash" unless a lot of those cells get sick. In E-coli, on the other hand, there are plenty of genes in which a single mutation kills the whole organism. (302 of them according to Japan's National Institute of Genetics: http://www.shigen.nig.ac.jp/ecoli/pec/index.jsp http://www.shigen.nig.ac.jp/ecoli/pec/index.jsp)