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the claim

Instant-runoff voting can fail monotonicity, meaning a candidate can lose because voters ranked that candidate higher.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
2 sources for · 0 against

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Is it true that Instant-runoff voting can fail monotonicity, meaning a candidate can lose because voters ranked that candidate higher?

Yes. A reference article on instant-runoff voting states that IRV is sometimes vulnerable to a paradoxical strategy of ranking a candidate higher to make them lose, because IRV fails the monotonicity criterion. A peer-reviewed paper also treats monotonicity as a property IRV extensions are evaluated against.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked

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Evidence for · 2
Instant-runoff voting - Wikipedia
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Instant-runoff voting - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Instant-runoff_voting

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More for · 1
Generalizing Instant Runoff Voting to Allow Indifferences
2024
Get citation
Generalizing Instant Runoff Voting to Allow Indifferences. (2024). hal.science. https://hal.science/hal-04728017v1

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