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What’s the opposite of free speech? If you answered, “totalitarian censorship,” you are right -- and you are old.

In the Internet age, censorship is all about allowing partial, temporary free speech, then shutting it down once enough has been said. The innovator, as usual these days when it comes to nondemocratic governance, is China, where the leading microblog site, Sina Weibo, unveiled its modified censorship model this week.