From Washington Post (via Seed Zeitgeist):
These pieces of the story point in the direction of fraud, to be sure. They have led experts to speculate that the election results released by Iran’s Ministry of the Interior had been altered behind closed doors. But we don’t have to rely on suggestive evidence alone. We can use statistics more systematically to show that this is likely what happened. Here’s how.
And, the crux of the matter is this:
Why would fraudulent numbers look any different? The reason is that humans are bad at making up numbers.
Now, I know what is needed; a good software which would spew out numbers, which, while put through any statistical analysis, would still show that nothing is amiss!