[EM] Issues, Condorcet, and IRV (was: IRV vs. plurality)

[James Green-Armytage]

>>"The participation criterion says that the participation in the election
>>by a same-voting group of voters should never worsen (due to the opinion
>>of this group) the result of the elections"
>
>Right.
>
>The voter participated and got a worse result because the cutoff was 
>in the wrong spot.

A worse result than if they had voted differently, but not a worse result
than if they had not participated at all.

>>So, if you *delete* the ballots cast by those voters altogether, it
>>changes the outcome to something they prefer. This is the test of the
>>participation criterion; if this can happen given rational votes, then
>the
>>method fails the criterion.
>
>If you delete the ballot and then determine the winner, A could 
>win...which is what they prefer.
>

A's chances of winning are not any better without the ballot than with it.
The voter gets no advantage from staying home. 

You are making us repeat ourselves.

Approval passes the criterion. That doesn't necessarily mean that Approval
is a marvelous voting method, as plurality passes it too, etc. But you
don't have the option of redefining the criterion, it is what it is,
whether you think it is valuable or not.

James