For what it's worth: this article is syndicated from Business Insider. It wasn't written by San Francisco Chronicle staff. Here's the original: http://www.busi

For what it's worth: this article is syndicated from Business Insider. It wasn't written by San Francisco Chronicle staff. Here's the original: http://www.businessinsider.com/the-sudden-mysterious-exit-of-a-quora-cofounder-has-silicon-valley-baffled-2012-10 http://www.businessinsider.com/the-sudden-mysterious-exit-of...