Scott makes a big deal about Lenski’s long-term bacterial experiments, but these actually support my thesis. Although a very trivial adaptation happened (optimal growth on a given medium), his bacteria shrank in genome size (the functional genome decreased). Evidently the more rapid growth was largely accomplished through genetic degeneration. Many useful genes not essential in that artificial environment were apparently lost. When transferred to a natural environment, those highly degenerated bacteria would essentially be dead-on-arrival.