Let's rename Smith-Condorcet
Steve Eppley
seppley at alumni.caltech.edu
Tue Jan 14 12:54:51 PST 1997
Hugh T wrote:
>"Instant Majority" seems to imply that the winner will have a
>majority. The question is, a majority of what? Only if we mean "a
>majority in at least one pairwise race (excluding equal rankings
>from the denominator)" can we say that Smith//Condorcet guarantees
>that the winner will have a "majority".
The accompanying description of IM would presumably say that the
method will identify the majority in each of the possible 2-candidate
pairings, etc.
>(One might even quibble that tied pairwise races could elect a
>candidate who does not have a majority in any race.)
-snip-
A name doesn't have to be perfect to be better than S-C. Looking for
a perfect name is like searching for the holy grail.
> When I earlier suggested that the use of "majority" in the
>statement of the so-called "Majority Rule" criterion was ambiguous,
>it was courteously explained to me that it clearly meant a majority
>of the total voters casting ballots, and it was pointed out that the
>more basic criterion requiring election of the Condorcet winner, if
>any, was not about majority rule.
I'd say that electing the beats-all candidate, if there is one,
certainly is about majority rule.
-snip-
>However, the relationship between this feature and the term "Instant
>Majority" is too attenuated to enable supporters of S//C to defend
>that name against the charge that either the name is misleading or
>the system is ineffective to deliver what it promises. IRO
>supporters will pose examples and say, "where is your Instant
>Majority?"
I think the relationship between majority and S//C is much stronger
than does Hugh.
>To many, "Instant Majority" may imply a vote-transfer method by
>which candidates' totals are increased through elimination of other
>candidates, until someone has a majority. The use of "instant"
>connotes an iterative process that is being compressed.
I can imagine some people who have heard about transfer methods
thinking IM might be a transfer method because of the word "majority"
or a familiarity with "Instant Runoff." I don't feel the word
"instant" connotes iteration, however.
>The proposed name does not imply use of pairwise counts, much less
>the [EM] tiebreaker. It may be asking too much of a pithy name to
>cover the latter, but if we are to improve on use of proper names,
>it seems we should choose a name that implies that the beats-each
>winner, if any, will be elected.
Can you do that with a simple name?
About a year ago I used the acronym RBTP: ranked ballots tallied
pairwise. The problem, of course, is that there are many pairwise
methods.
>I would suggest avoiding "Instant"; it smacks of commercial hype --
>"instant winner" is what you are not after you scratch some
>sweepstakes promotion card, and there is a risk that puritanical
>types will associate the method with instant gratification, to be
>contrasted with primaries or runoffs where one must earn victory.
I agree this detracts from the appeal of IM.
>Incidentally, the abbreviation "IM" means "International Master" to
>chessplayers (this is the category below Grandmaster -- very good,
>but not the best).
GM suggests General Motors. Good, but not the best. :-)
>I was loathe to suggest my feeble attempts at a catchy acronym, but
>am emboldened by Rob Lanphier's efforts. "Undefeated or Lowest
>Total Reached by Adversary" could be "ULTRA" -- I know this is not
>quite technically accurate. "Beats All or Least Loss by Opponent's
>Total" could be "BALLOT". I am sure others can do better.
I think that if an acronym is used, it's still important that the
expanded version not put off the listener.
How about "Near Perfect"?
---Steve (Steve Eppley seppley at alumni.caltech.edu)
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