I'm not sure how often or why RP(approval), SSD(approval), or "While there is no CW, eliminate the Approval loser" would much differ.
RP(approval) would be approval-completed Condorcet that restricts itself to members of the Smith set.
SSD(approval) would be approval-completed Condorcet that restricts itself to members of the Schwartz set.
"While there is no CW, eliminate the Approval loser" would always elect a member of the Smith set, but it would not, strictly speaking, be approval completed Condorcet, since it could elect someone who is neither the approval winner nor the Condorcet winner.
I remember Forest having another idea about ACC refinement recently, but I never had a chance to look at it seriously.
> > A more complicated example: > > > > Let's say a ballot comes in as A=B>C=D, and the published preferences of > > candidates A and B are A>B>C>D and B>A>C>D, respectively.
What if B's published ballot was B>A>D>C?
-Adam
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