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Complex Numbers #1054947 added September 1, 2023 at 11:11am
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Let's Settle This Like Men
Whenever two people need to decide who's doing what undesirable task, they can always figure it out with fists.
As the subhead suggests, this is a book promotion. Whatever; I still enjoyed the article.
Unless you have lived in a Skinner box from an early age, you know that the outcome of tic-tac-toe is utterly certain. At first glance, rock-paper-scissors appears almost as bad. A four-year-old might think there’s some strategy to it, but isn’t it basically random?
I'll note here that the website this comes from is The MIT Press Reader, and the book it promotes is in the field of psychology, so they can be excused for expecting their audience to know what a Skinner box  is.
Players quickly learn that this is a guessing game and that your goal is to build a mental model of your opponent, to try to predict his actions.
So, it's good practice for poker.
Note the use of the masculine pronoun. While it's a game anyone with at least one mostly-intact hand can play, I've never heard of women settling their differences in this manner. I'm sure it happens; it just seems to be primarily a dude thing.
The reason rock-paper-scissors is not a purely arbitrary game, and the reason that an excellent player will win more often than chance would predict, is that human psychology is not random, and some behaviors are — not necessarily predictable, but likely to occur more often than chance would dictate.
This is also what some people miss about classic cheating methods such as loaded dice or marked cards: they give the cheater an edge; they're not going to work 100% of the time. That would be too obvious, anyway. But even if you can shift your odds from 17% to, say, 24% (not unreasonable for loaded dice), you still do better in the long run.
The article, obviously, goes into some of the psychology involved. It seems to be related to the Gambler's Fallacy, only kind of in reverse? Even if you have no intention of ever making decisions via RPS, the analysis has other implications.
In other words, at first glance rock-paper-scissors appears to be a guessing game, with victory going to the player who can outguess his opponent; at second glance, it appears to be purely arbitrary; and at third glance, the original supposition is justified. It is, in fact, a guessing game with victory going to the player who can outguess his opponent, but there are strategies to “outguessing.”
If that makes your head hurt, consider the RPS extensions that have been developed by dedicated RPS researchers all over the world. Perhaps the most famous one is Rock-Paper-Scissors-Lizard-Spock, popularized by the show The Big Bang Theory.
I've only seen a few clips from that show, enough to know that it's the nerd equivalent of blackface. RPSLS is still not complex enough for true nerds. For that, we need other extensions.
Like this one.
Or this one, with a brain-melting 101 possible throws.
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