Michael Ossipoff wrote:
Is it [SF] the version of FBC that is being used in San Francisco?
"Sincere Favourite" (SF) is Kevin Venzke's more 'technical',
easier-to-test-for version of the
Favourite Betrayal Criterion (FBC).
*Sincere Favorite*.
/Suppose a subset of the ballots, all identical, rank every candidate
in S (where S contains at least two candidates) equal to each other,
and above every other candidate. Then, arbitrarily lowering some
candidate X from S on these ballots must not increase the probability
that the winner comes from S./
A simpler way to word this would be: /You should never be able to help
your favorites by lowering one of them./
The specific purpose behind this criterion is to ensure that voters
need not worry that by listing multiple favorite candidates, they
won't thereby cause one of those candidates to lose the election. If
voters lack this confidence, they may choose to simply not rank the
candidates they believe aren't likely to win, in order to keep them
"out of the way" of candidates who might be able to win.
http://nodesiege.tripod.com/elections/
I like this version, but it is much less well known than FBC and is
almost the same thing, so I sometimes refer to "FBC/SF".
Chris Benham
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