On: Why are the Russians so good at chess?

[idlewords]

Soviet chess grandmasters came from all kinds of ethnic backgrounds. There's no genetic argument to make.

[WilliamLP → idlewords]

I'm not making an argument for chess. I'm making an argument for the possible existence of a single counterexample to the "obvious" claim that if a group of people are good at X, regardless of the nature of X, then it is necessarily only due to cultural factors.