Nate Silver looks through it again:

Based on conversations with people who are a bit more informed about Iranian domestic politics, it seems absolutely possible that Ahmadinejad in fact won (although his share of the vote was probably boosted through "dirty tricks" -- intimidation both before and during the election, jamming text messaging services, etc.) and also absolutely possible that the election was stolen. The statistical evidence is intriguing but, ultimately, inconclusive.

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