[EM] Confirmed!: Condorcet efficiency of IRV > 2-stage runoff

[Adam Tarr]

>This reminds me of another question that I've been wondering about. Does
>anybody know of an example in which IRV would give a superior result to
>ordinary lone mark plurality in the case of near perfect information,
>assuming the use of near optimal strategy by the voters in both cases?

Let me re-cast this question:

Is there any deterministic voting system where voters with perfect 
information, using  optimal strategy, will NOT elect the Condorcet winner?


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