The extremely young science of the microbiome is going from microbiome/disease 'associations' to establishing causation. Weird how this hasn't occurred for IQ in the past 100 years...https://twitter.com/EricTopol/status/938475406507720704 …
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Right because no objective way exists. The way we 'find out' who's 'smarter' is based off of tests that force normal curves. IQ tests are garbage with assumptions built into them. That's why 'IQ heritability' increases with age.
IQ tests are pretty good at determining whether one person is smarter than another.
Because of how items are selected for the test. It's based on prior assumption.
Do IQ tests generally tell you who's smarter or not?
Because of how they're made. You can make tests that show other groups as smarter based on item selection. This is a fact.
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