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With "like" buttons permeating the web, and Facebook's intent to connect everything online using this new form of "social link", should Google be concerned?
After all, if "liking" surpasses linking as the way to express interest in a piece of content, surely Google loses access to the best source of what's good online? Is this the beginning of the end for Google's PageRank algorithm?
That's the topic of my CNN column this week.