Re: [EM] eliminations methods like IRV

[Martin Harper]

Forest Simmons wrote


> is it possible for IRV to pick the same candidate as both the best and the
> worst?  In other words, is there a pair of examples which are identical
> except for the reversal of preference directions, that both have the same
> winner when IRV is applied?

According to http://www.fortunecity.com/meltingpot/harrow/124/criteria.html

IRV fails the "Reverse Symmetry Criterion", so yes, there apparently is 
such a pair. But don't believe everything you read... ;-)