A few methods that pass CD: ICT Symmetrical ICT MMPO MDDTR
A few methods that fail CD: Beatpath, RP, Kemeny, VoteFair, MinMax(wv) and apparently all traditional unimproved Condorcet versions. Approval and Score don't pass CD either. But, as I said before, it's so easy to automatically avoid the chicken dilemma nuisance with a rank method that there's no excuse for a rank method to fail CD, and so no rank method that fails CD should be considered. I consider CD-compliance to be the only significant improvement by ICT over Approval and Score. Along with Approval and Score, MJ, too, fails CD. Also, the chicken dilemma and FBC are relevant to the question of whether a method's Condorcet Criterion compliance means anything. IRV passes CD, but it's particularly flagrant FBC failure (among other things) disqualifies it for elections. Speaking of IRV, I should add that it of course meets ZLNHe, because it meets LNHe. Mike Ossipoff ---- Election-Methods mailing list - see http://electorama.com/em for list info
