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Jonathan_Graehl comments on Intelligence Amplification Open Thread - Less Wrong
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I wonder how many of the non-drinkers are super-tasters. If so, this could make dietary differences (like avoiding dark green veggies) which would affect longevity.
On the other hand, this is a long inferential chain, and just to generalize from one example, I don't like the taste of alcohol or other bitter flavors (grapefruit, coffee unless considerably buffered), but enjoy most dark green veggies.
Fascinating idea for another confound they didn't control against. How common is what you call a super-taster, though? If it's infrequent enough, it can't possibly explain the entirety of the huge effect in the study.
wikipedia-- the article puts the prevalence at about 25% for people of European decent, but they're defining supertasters as people who experience tastes more intensely, and it does correlate with disliking alcohol and bitter flavors.
On the other hand, using the expansive definition of supertaster, for all I know there are people who experience bitter intensely, enjoy it, and make fine distinctions between different bitter flavors.