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private_messaging comments on What is the difference between rationality and intelligence? - Less Wrong
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From what I've seen in terms of word use, the "rationality" is mentioned when picking one of several explicitly listed choices. Whereas behaviours commonly described as "intelligent" usually involve actions from a very large number of potential choices. Hardly anyone says it is irrational to not invent something (but it certainly is unintelligent to be unable to invent something simple).
A lot of IQ tests are multiple choice (i.e., choose from a small number of possible answers for each question), but people complain that they don't measure rationality..
Picture a mind that has much cloudier memory of what happened beyond 5..10 minutes ago, starting at the age of 20. This wouldn't impact the IQ score much, will impact intelligence on tasks that you have to think about for more than 5..10 minutes. Plenty of things are not measured by IQ tests, things that are necessary for all sorts of problem solving. From what I gather, Stanovich is quite open to there being a wide array of intelligence traits not measured by IQ tests; it's the people who sell a rationality enhancement that doesn't affect IQ test score, who need the rationality to reside entirely within the non measured traits (rather than only partially).
Consider those 'pick a correct picture to continue the sequence' tests. They're essentially testing your ability to assess complexity (and assign priors based on complexity), a traditionally 'rational' thing. As well, they're impacted by your tendency to think hard even when encountering an informal problem. Of course, the correlation is not going to be perfect, but there's going to be a correlation.
Actually, thinking more about the word use... it seems to me that among the multiple choice situations, there's a certain tendency in certain circles to use the word 'intelligence' when the answer is demonstrably correct, and the word 'rationality' when you couldn't properly demonstrate anything.
A collision of overconfidence with reality can yield either a reduction in overconfidence, or reduction in overconfidence's scope to answers that can't be checked...