3 ms·
Arrow says you can only have 3 of the 4 properties in the theorem, but it doesn't say anything about other properties, and it doesn't say which of the 4 propert
by singron 4y ago
Arrow says you can only have 3 of the 4 properties in the theorem, but it doesn't say anything about other properties, and it doesn't say which of the 4 properties is most important. And if you bend the rules, it doesn't apply (e.g. random dictatorship).
This is kind of like saying one database isn't better than another because CAP theorem exists. Sometimes you prefer one of C or A, or a bad database is missing both C and A, or one has better licensing.
- bedobi 4y agoThat's kind of the point though? When they say their voting system is perfect or the best, they're just saying it because they've been told to think so, not because they have a meaningful understanding of which properties their system satisfies, and why those are better or more important than those satisfied by other systems. There's 0 understanding of the tradeoffs. By all means, if someone does know about all this and makes a well reasoned case that their preference is for this system and why, that's one thing, but that's not the case with 99% of the Australian voting public.