On 02/19/2012 09:37 PM, Kevin Venzke wrote:
Does anyone understand why the DH3 concept exists? Why envision three
major blocs, instead of two major blocs plus the small bloc belonging
to the pawn candidate? That doesn't require four candidates and more
closely resembles how burial problems are usually considered...
If there are just two blocs, then the DH3 scenario never gets off the
ground. Say you have a nobody, Z, and two viable candidates (A and B).
Then say the honest ballots are something like:
53: A > B > Z
46: B > A > Z
1: Z > A = B
Then the B-supporters can't get the ball rolling, at least not in
Condorcet, by burying A. Even if they do so, A will win by first
preferences alone.
Technically speaking, it takes three viables to make a cycle, and you
need cycle-making/turning strategy to make DH3 work in Condorcet. In
Borda, you could do a sort of DH3 with only two blocs, but that's
because Borda doesn't satisfy Majority.
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