part 5, 1st Choice Criterion

[Mike Ositoff]

Different methods fail the 1st choice criterion in different
ways. Instant Runoff (also known as the Alternative Vote, MPV
& other names) fails it when it elminates the CW because
your vote hasn't reached it yet. To prevent that, one must
insincerely uprank that CW, sometimes to 1st place.

We know how Plurality violates that criterion.

Approval meets the weak form of that criterion because it
lets you vote for as many candidates as you want to, giving
each a whole vote. The candidate with most votes wins, just
as in Plurality. So you never have to vote a less-liked alternative
over your favorite in order to protect a CW's win.

Mike