alt Hacker NewsI don't think many people dispute the fact that the environment plays a role in intelligence. Not even many people dispute that there is some heritability to intelligence. What is in dispute is whether that heritability means that some races are on average genetically more intelligent than others (and another problem is how to define intelligence).
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If we define intelligence as IQ then the evidence is overwhelming that the average differs among races. Even in Singapore, which has a very high standard of living, nutrition etc., we still see Chinese Singaporeans perform significantly better than Malay Singaporeans on various measures of intelligence, with Indian Singaporeans somewhere in the middle. The same pattern is seen among Chinese, Indians and native Malaysians in Malaysia, and globally when we compare the mean IQ scores of China, India and Malaysia.
I don't understand how the precedents could lead to any question regarding the disputed conclusion
How do you define races? As I said in another comment definitions shift and they are different in different countries. I have an encyclopedia from the 1950s that defines South Asians as "Caucasoid". Some East Africans were also defined as "Caucasoid" historically.If we define races on the basis of genetic similarity then almost everyone whose ancestry is from Eurasia is the same "race", but people whose ancestry is African belong to multiple races.