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Comment by kscaldef | Hacker News Reader

I don't believe this satisfies the Condercet criterion either. Consider these rankings of preferences:

    20% A ...
    20% B ...
    15% C ...
    15% D C ...
    15% E C ...
    15% F C ...

In a two-round run-off, one of A or B will be elected, despite the fact that 60% of voters prefer C over either A or B.

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And in the real world, people would second guess this, and enough people would tactic vote for C that it would't be a problem.

"But then they can't vote for their prefered candidate which was the whole point"

Well, some people can. D, E, F could still get a few percentage points. More importantly, I don't think we would see convergence to a 2-party system.

Unless I am missing something, it looks like at least 3 parties could be sustained.

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