IRV in SF

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Fellow students of mathematics: This concept (which I admit I had not
thought
through when I voted for it) now seems to me to fall afoul of the famous
Arrow
Impossibility Theorem (for which work I think he shared a Nobel Prize).
Kenneth
Arrow showed that legislative choices are not transitive, much to the
surprize
of all, especially legislators. Here ranking voters are the legislators. The
outcomes are not determined by a transitive logic and will appear
arbitrary in
sequencial binary analyses.

That's actually a good argument for IRV over (uh... has to look back at the
original mail) Condorcet voting. IRV can be modelled as a non-instant
runoff, with the voters being presented with a shorter list of candidates
in each round; the only hard thing about IRV is getting voters to
understand that, rather than thinking this is some sort of weighted vote
system (a common misconception).

Condorcet assumes that the binary choices *are* transitive, while IRV only
asks, "Well, if you can't have A, for whom would you vote, if anyone?"

~Chris
- --
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Political gadfly and freelance nerd: <URL: http://crism.maden.org/ >
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