[EM] A pairwise elimination satisfying SFC,SDSC

[Martin Harper]

Blake Cretney wrote:

> Some of the reasons that IRV is advocated, which are not simple errors
> in reasoning are the following:

I'd add simplicity of voting. Because IRV effectively ignores lower
preferences, you don't need to vote them or think about them. This makes
it a lot easier to vote without being concerned that you're somehow
messing it up. This applies to Approval too.