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3 posts found
Dec 12, 2019
ssc
57 min 7,893 words 159 comments podcast (52 min)
The post examines whether calorie restriction slows aging, concluding it likely does but may not be worth the drawbacks for most people. Longer summary
This post discusses the effects of calorie restriction (CR) on aging and longevity, examining evidence from animal studies, human population studies, and proposed biological mechanisms. The authors review the paradox between lab animal studies showing increased lifespan with CR and human population studies suggesting optimal longevity at normal BMIs. They conclude that while CR likely extends lifespan modestly, the potential risks and discomfort may outweigh the benefits for most people. Shorter summary
May 04, 2016
ssc
25 min 3,455 words 599 comments
Scott Alexander refutes PZ Myers' race car analogy against genetic engineering for intelligence, showing that high IQ positively correlates with many beneficial traits. Longer summary
Scott Alexander critiques PZ Myers' argument against genetic engineering for intelligence, which uses a race car analogy to suggest optimizing for intelligence might trade off against other important traits. Scott shows that, contrary to this intuition, high IQ correlates positively with many desirable traits like longevity, height, and health. He explores possible explanations for this, including heterozygosity advantages, mutational load, and trade-offs with traits important in evolutionary history but less so now. Scott concludes that while caution is warranted, the race car argument is likely less of an impediment to genetic engineering than it might seem. Shorter summary
Scott Alexander contrasts two studies with opposite conclusions about stress, highlighting the inconsistency in how we interpret adversity's effects. Longer summary
Scott Alexander discusses two contradictory studies: one showing fat-shaming leads to weight gain, and another suggesting Holocaust survivors have greater life expectancy. He points out the potential flaws in both studies and the ease with which psychology can explain opposite outcomes. The post highlights how we often switch between contradictory narratives about stress and adversity, using them selectively to support various arguments. Scott emphasizes the importance of critical thinking when interpreting such studies and their implications. Shorter summary