Just ask my grade 9 math teacher who, once she managed to drag me from my second period squatting spot in the cafeteria, forced me to repeat the course.
As such, I have no idea what these people are talking about...but it sounds interesting nonetheless...
In fact, last digits in a fair election don't tell us anything about the candidates, the make-up of the electorate or the context of the election. They are random noise in the sense that a fair vote count is as likely to end in 1 as it is to end in 2, 3, 4, or any other numeral. But that's exactly why they can serve as a litmus test for election fraud. For example, an election in which a majority of provincial vote counts ended in 5 would surely raise red flags.
Why would fraudulent numbers look any different? The reason is that humans are bad at making up numbers. Cognitive psychologists have found that study participants in lab experiments asked to write sequences of random digits will tend to select some digits more frequently than others.
So what can we make of Iran's election results?
Much, it would seem.
I'm fine with just assuming that any information coming from Iranian officialdom is false or custom-tailored to meet their own ends. The head-cracking in the streets leaves me in little doubt as to how much the Iranian government values the principles of democracy.