Originally Posted by
DJ Mike
An interesting point that no one has really highlighted in this debate (because it is quite mathematically complex) - AV is not a monotonic voting system. Monotonic means votes for a candidate always increase their chances of winning. Under AV, voting for your genuinely preferred candidate can actually hurt their chances in certain scenarios. That's because any candidate who stays in never has their alternate preferences considered, but those who are dropped do. There are some great examples on the net about AV and non-monotonicity. It might seem like such an academic and pointless thing to bring to the debate, but a monotonic voting system is very important to avoid disenfranchising voters. If you voted for someone and found out you'd actually hurt their chances by giving them a vote, how would you feel?
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