In the article to which you refer (http://www.nytimes.com/2010/06/13/health/research/13genome.html?hp http://www.nytimes.com/2010/06/13/health/research/13genome

In the article to which you refer (http://www.nytimes.com/2010/06/13/health/research/13genome.html?hp http://www.nytimes.com/2010/06/13/health/research/13genome.h...) Wade suggests that diseases are partly caused by "a host of rare genetic variants" and that "with most diseases, the findings [about disease-causing mutations] have explained only a small part of the risk of getting the disease." Is something awry in Liberman's critique or is Wade just changing his mind arbitrarily?