Dear Richard Fobes,

you wrote (4 May 2010):

> The Condorcet-Kemeny method has significant advantages over
> the Condorcet-Schulze method, but some of those advantages
> have not yet been recognized.
>
> Some of the advantages involve not-yet named criteria.  For
> example, reversal symmetry just requires that the winner not
> be the winner if all the ballot preferences are reversed,
> and both Condorcet-Kemeny and Condorcet-Schulze meet that
> criteria.  A not-yet named criteria beyond that, which I
> would call "full reversal symmetry," would require a
> complete symmetrical reversal of popularity ranking if all
> the ballot preferences are symmetrically reversed, and
> Condorcet-Kemeny meets that criteria, but Condorcet-Schulze
> does not.

Also the Schulze method satisfies this criterion.

Markus Schulze


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