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The last few weeks have been awash in nerds and geeks. ChipChick published a guide to dating a geek girl, while CNN decried “wannabe models” pretending to be nerds. Before that came the shootings in Aurora, where media described killer James Holmes as a science-loving geek or a “dark Trekkie-like person.” While these pieces have generated thoughtful responses across the web, eventually they run into the same problem: defining what “nerd” and “geek” are actually supposed to mean.