[EM] Approval Voting vs Instant Runoff Voting:

[Martin Harper]

Richard Moore wrote:

> Martin Harper wrote:
> 
> 
>> In plurality you want to bolster your support your favourite because
>> apparently popular candidates get compromise votes and don't get chucked
>> out in favour of compromises. In approval, though, the same doesn't
>> apply. I can see only one case where one would want to insincerely dump
>> your favourite in a poll:
> 
> 
> I never said people would dump their favorites in the poll and I can't see
> any
> rational person doing so (unless they had the kind of omniscience it would
> take to predict the effect on other voters). What I was referring to is
> voters who
> would be likely to vote two (or more) candidates in the election, stating
> in a poll that they will only vote for one (their favorite). Thus if I say I
> will vote
> A and not AB, I might hope to cause some B voters to vote AB as well.

Right - and I can't see any case where saying you will vote A not AB 
will cause B voters to vote AB. I'm sure such a case exists - but I 
can't find it: hence my question at the end: can you provide one?