[EM] IRV in San Francisco

[Eric Gorr]

At 7:44 AM -0800 11/12/04, Justin Sampson wrote:
>On Fri, 12 Nov 2004, Eric Gorr wrote:
>
>  > Well, it will cause IRV to fail the Independence of Clones Criterion and
>>  thereby be subject to a spoiler effect again.
>
>Doesn't IRV suffer from spoiler effects anyway?

Depends.

The method itself passes the ICC, so spoilers cannot come from there.

It, of course, fails IIA (as all ranked ballot methods do), so 
spoilers in this context still exist. Of course, since no ranked 
ballot methods pass IIA, talking about spoilers in this context is 
not very interesting.

Are there more directions from which spoilers can appear?
I am currently not aware of any.