Google already has "search engine sex", it's called revision control (although I really doubt this is what Krugman had in mind.) To solve Google's spam problem,

Google already has "search engine sex", it's called revision control (although I really doubt this is what Krugman had in mind.) To solve Google's spam problem, they either need better business priorities or smarter engineers, depending on which popular explanation of Google's spam problem is accurate. > And the most persuasive answer, as I understand it, is defense against parasites. Probably more likely the general ability to merge in one generation two or more highly advantageous adaptations into one individual, which could include parasite defense but also everything else.