[EM] IRV vs Plurality (Dave Ketchum) (Kathy Dopp)

[Kristofer Munsterhjelm]

robert bristow-johnson wrote:
> 
> On Jan 16, 2010, at 3:41 PM, Kathy Dopp wrote:

>> Exactly as I tried to point out to you, you were either disallowing
>> voters to rank only two candidates or to rank all three.
> 
> no, it has nothing at all to do with allowing or disallowing the voters to
> 
>>   I see I was
>> correct and you are disallowing voters to rank only two candidates and
>> have, as Abd ul also pointed out to you, left 3 choose 2 or 6 possible
>> choices out of your list.
> 
> because all unmarked candidates are tied for last place, when there is 
> only one unmarked candidate, there is *no* consequential difference 
> between leaving that candidate unmarked or marking that candidate last.

Is that true in IRV? Consider a vote of the sort:

A > B

where A and B are eliminated. Then this would be an empty vote, I think, 
and so be removed from the count, whereas if it had been

A > B > C

it would count as one point for C.