Kevin,
--- Chris Benham <[EMAIL PROTECTED]> a écrit :
  
> This is my proposed clear definition:
> "An  'approval vote' is one that makes some approval distinction among 
> the candidates. It is sincere if 
> (1)the voter sincerely prefers all the approved candidates (or single 
> candidate) to all the not approved candidates (or single candidate), and
> (2) it is how the voter would vote without any knowledge or guess as to 
> how other voters might vote."
    

I have trouble with (2). We could assume that "how the voter would vote"
means optimal, above-mean approval strategy. But obviously that is a
problem for a definition of "sincerity." It would also make approval
satisfy NZIS.
I  don't have a big problem with plain Approval satisfying NZIS.  Of  course Approval is promoted as a
method that invites voters to strategize.

Otherwise we could choose to not define "how the voter would vote." But
in that case nothing prevents a strategically unwise vote from being
sincere, so that I don't see how DMC could satisfy NZIS. 
If , by some absolute standard in the voter's mind, the voter sincerely "approves" at least one but not all of the candidates
then  "sincere approval" is clearcut.  I suppose if this isn't the case then  as you say if we leave undefined "how the voter
would vote"  there is still 0-info. approval strategy (so plain Approval doesn't really meet NZIS).

You would have
to claim that DMC has no zero-info approval strategy.
It seems clear that DMC  has no zero-info. *ranking* strategy. (Is that what you meant?)  But unless  we define  "sincere approval"
as  "optimal zero-information approval ('strategy')",  then  DMC  perhaps doesn't fully meet  NZIS.


Chris  Benham




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