simplicio comments on Undiscriminating Skepticism - Less Wrong
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Here's explanation of my pro-ultra-behaviorist position.
First, I haven't seen any convincing evidence against ultra-behaviorism, but plenty against ultra-innatism. Look at Flynn effect for example. There's absolutely no way a universe in which ultra-innatism is true is compatible with Flynn effect. There has been so many drastic shifts in behavior without slightest shift in underlying genetic makeup of population - abandonment of violence, shift from large families and low offspring investment to small families and high offspring investment, shift from agricultural to urban lifestyle etc. - these are vastly greater than any of the proposed genetic variations. And not a single kind of proposed genetically-based behavioral variation had a convincing genetic marker found for it (yes, there are heredity studies on twins etc. but I find they highly unconvincing). So my estimate of the truth is far closer to ultra-behaviorist end than ultra-innatist end, so much closer than ultra-behaviorism might be a good "tl;dr" version, even if not 100% accurate.
And second, I find ultra-behaviorism instrumentally useful. Overestimating how much you can change your life leads to better outcomes than underestimating it and just giving up.
Just to clarify, in arguing against ultra-behaviourism I am not touting the opposite stupidity of ultra-innatism instead. So yeah, I agree. The 40-0-60 heuristic is closer to my view (40% of variance due to genes, 0-10% upbringing, 60% other environmental).
Yup. Culture and language is an incredible thing. Still, many traits are partially heritable, some strongly so. I refer you to Bouchard's meta-analysis. Why do you find twin/sibling/adopted sibling studies unconvincing?
That is exactly where we stand now. The problem is, genetics is getting important in public policy. The tl;dr version needs to lose the tl;d if educated people are going to make policy decisions based on it (which they are).
Mm... maybe. On the other hand knowing genes matter might prevent one taking needless risks. For example, my family is swarming with alcoholics going back 3 generations. Maybe if I wasn't a teetotaler I'd be fine... on the other hand, there's no good reason to fire a gun at your head even if you're pretty sure it's not loaded.
I'm very wary of this "instrumental usefulness" of beliefs though. It seems a slippery slope.