[Election-Methods] Can someone point me at an example of the nonmonotonicity of IRV?

[Kathy Dopp]

Someone called me today and pointed out in a way that it finally sunk
in how awful it is that voters can actually cause their own first
choice candidate to LOSE by casting votes for their first choice
candidate in IRV elections.

Could someone please point me to a fairly simple (if possible) example
of the nonmonotonicity feature of IRV elections where adding say two
more votes for candidate A causes candidate A to lose whereas
candidate A would have won the election without the addition of the
two more first choice votes?

I find it absolutely astounding now that I think about it, that anyone
could support a method where the voters going to the polls cannot know
if their first choice votes for a candidate would hurt or help their
candidate!

Thanks.

Pretty soon, if I find one more flaw of IRV, I'm going to have to
revise the title of the paper to "20 flaws & 3 benefits of IRV..."

-- 

Kathy Dopp

The material expressed herein is the informed product of the author
Kathy Dopp's fact-finding and investigative efforts. Dopp is a
Mathematician, Expert in election audit mathematics and procedures; in
exit poll discrepancy analysis; and can be reached at

P.O. Box 680192
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phone 435-658-4657

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How to Audit Election Outcome Accuracy
http://electionarchive.org/ucvAnalysis/US/paper-audits/legislative/VoteCountAuditBillRequest.pdf

History of Confidence Election Auditing Development & Overview of
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http://electionarchive.org/ucvAnalysis/US/paper-audits/History-of-Election-Auditing-Development.pdf

Voters Have Reason to Worry
http://utahcountvotes.org/UT/UtahCountVotes-ThadHall-Response.pdf