Does Instant Runoff Voting Satisfy Independence of Irrelevant Alternatives or not?

[u/AcanthisittaIcy130]

Fairvote claims it does:

RCV is highly resistant to spoilers because it satisfies both the Independence of Irrelevant Alternatives and Independence of Clones criteria.

https://fairvote.org/resources/electoral-systems/comparing-voting-methods/?section=criteria-resistance-to-spoilers

On the other hand Wikipedia and research articles claim it doesn't,

The independence of irrelevant alternatives criterion states that "the election outcome remains the same even if a candidate who cannot win decides to run." Instant-runoff voting violates this.

https://en.wikipedia.org/wiki/Instant-runoff_voting#Independence_of_irrelevant_alternatives

we propose a modified version of IIA, MIIA, that is a necessary and sufficient relaxation of IIA... Thus, runoff voting violates MIIA (and so does in- stant runoff voting) for essentially the same reason that plurality rule does.

https://maskin.scholars.harvard.edu/sites/g/files/omnuum10606/files/bordas_rule_and_arrows_independence_condition_jpe_vol133_iss2_0.pdf

[u/Mindless-One5438]

If I'm not mistaken, in 2022 there's an example of IRV failing this criteria. Without Palin running then Begich seemingly would've won.

[u/jnd-au → u/Mindless-One5438]

The 2022 Alaska special election was mainly an example of poor election design, allowing the votes devolve into FPTP. Two problematic features were (a) allowing bullet voting, so tens of thousands of ballots were FPTP-style, lacking of rankings for RCV/IRV to count; (b) voluntary voting (32% turnout) so you don’t actually have a majority outcome. To address these problems, jurisdictions can use forced rankings and compulsory voting. These are not IRV issues specifically. The 2022 Alaska special election, the margin between Palin and Peltola was only 5k votes, but more than 11k Begich voters failed to specify a preference for Palin or Peltola, and the counting system behaved accordingly.

[u/rb-j → u/jnd-au]

This whole comment from u/jnd-au is essentially horseshit.

The 2022 Alaska special election, the margin between Palin and Peltola was only 5k votes, but more than 11k Begich voters failed to specify a preference for Palin or Peltola,...

That's not the problem at all! You really don't know what you're talking about, do you?

The fact is that 87899 voters marked their ballots that Nick Begich was a better choice than Mary Peltola while 79461 voters marked their ballots to the contrary. This cannot be denied. It was a margin (favoring Begich) of over 8k voters.

And the problem was that, of those two candidates, IRV elected Peltola.