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<DIV>Hi Democracy Friends.</DIV>
<DIV> </DIV>
<DIV>As long as I know, the 'Independence of Irrelevant Alternatives Criterion'
may be explained as: If an election is held and a winner is declared, this
<U>winning candidate should remain the winner</U> in any recalculation of votes
<U>as a result of</U> one or more of the <U>losing candidates dropping
out</U>.</DIV>
<DIV> </DIV>
<DIV>To me, this criteria implies that any election should have a Condorcet
winner, because we might drop out all of the defeated candidates, except 1
of them, and this would establish a pairwise dispute between the winner and only
one of the defeated candidates, any one of them. </DIV>
<DIV> </DIV>
<DIV>However, the absence of a Condorcet winner can not be considered a problem
with an election method, but, instead, it only reflects ambiguities in the
electors' preferences. If what I wrote is correct, this means that the
'Independence of Irrelevant Alternatives' is not a valid criteria to evaluate
any voting method. </DIV>
<DIV> </DIV>
<DIV>I'm afraid I am not understanding correctly the 'Independence of Irrelevant
Alternatives Criterion' , so I ask you to correct me if this is happening.
</DIV>
<DIV> </DIV>
<DIV>I also ask confirmation if Arrow used this criteria to prove his famous
impossibility theorem.</DIV>
<DIV> </DIV>
<DIV>Thank you.</DIV>
<DIV> </DIV>
<DIV>Marcos C. Ribeiro</DIV>
<DIV>Belo Horizonte - Minas Gerais - Brasil.</DIV>
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