Some traits that may seem unintelligently designed, however, can actually be useful.Examples include fever, diarrhea and vomiting, which aid in purging microbial infections.

• 此外，有一些特徵尽管设计得似乎不怎麽高明，但实际上却是有作用的，例如发烧、腹泻与呕吐等，其实都是为了帮忙抑除微生物的感染。