pet_poll_four_methods — one electorate, four methods, three winners (BV2132)¶
A single BetterVoting election (ykjjhy, Test ID BV2132) with four races over the same 22 voters and three pets (Dog, Cat, Fish) — Plurality, RCV-IRV, Approval, STAR. The ballots are made-up and tuned so the methods disagree, unlike Equal.Vote's meta_pets that inspired it.
▶ Live results: bettervoting.com/ykjjhy/results
| Method | Winner | Why | Read · run |
|---|---|---|---|
| Plurality | Dog | most first choices (9) — but 13/22 rank Dog last (spoiler/FPTP) | page · .yaml |
| RCV-IRV | Fish | Cat (fewest first choices) eliminated first → center squeeze | page · .yaml |
| Approval | Cat | broad support — approved by 22 of 22 non-Dog partisans | page · .yaml |
| STAR | Cat | score leaders Cat & Fish advance; Cat wins runoff 15–7 | page · .yaml |
Cat is the Condorcet winner (beats Dog 13–9, Fish 15–7) — it wins the two cardinal methods and loses the two that only read first choices / eliminate. Every race's winner is cross-checked: LH engine = BetterVoting on all four.
→ Full lesson: bv2132_ykjjhy_pet_poll_four_methods.md