[EM] A weaker SSFC, and a stronger SDSC

[MIKE OSSIPOFF]

A Weaker SSFC:

If, instead of saying that if the majority preferring the CW to Y vote 
sincerely, then Y should lose, we could say that that majority has a sincere 
way of voting that ensures that Y will lose. That makes the criterion easy 
to meet.

In fact, if we make it that easy, we don't even need the part about the CW:

Sincere Strategy Criterion (SSC):

If a majority prefer X to Y, then they should have a sincere way of voting 
that will make Y lose.

[end of SSC definition]

SSC is met by Approval. AERLO or ATLO confer SSC compliance on a number of 
methods, including Condorcet wv & Bucklin.

Un-enhanced Condorcet wv doesn't meet SSC. Because Approval beats Condorcet 
wv, by SSC, because Approval doesn't allow voting of all of one's 
preferences, SSC is misleading and unfair, and I probably won't use it.

A stronger SDSC:

Expressive Strategy Criterion (ESC):

If a majorilty prefer X to Y, then they should be able to make Y lose, while 
voting all of their preferences.

[end of ESC definition]

I call it expressive voting if somone votes all of their preferences. It 
would be unfair to say that a ballot isn't sincere if it doesn't do that, 
since Approval doesn't allow it. Hence the term "expressive".
I call a ballot expressive if it votes all of the voter's preferences among 
the candidates.

AERLO confers ESC compliance on Condorcet wv & Bucklin. ATLO confers ESC 
compliance on Condorcet wv.

I probably will sometimes mention ESC, because being able to vote all of 
one's preference while meeting the goal of making some Y lose, can have 
practical value. AERLO & ATLO, though they add something that the voter can 
do, in addition to ranking candidates over eachother, don't diminish the 
effect of voting candidates over eachother and thereby affecting the 
outcome.

Mike Ossipoff

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