> we should really be talking about this We don't really know how DNA affects cognitive ability in general, much less what if any affect ethnicity or gender ha

> we should really be talking about this We don't really know how DNA affects cognitive ability in general, much less what if any affect ethnicity or gender has. We don't know the basics because we can't even define the independent variable. What exactly is "cognitive ability" anyway? The definition of "cognition" is far more social and cultural than physical, so how do you measure it without social and cultural bias? After we understand cognition, then we can examine how nutrition, education, social interactions, early childhood experiences, and other environmental factors affect it. That's what we really should be talking about. But it's dangerous and counterproductive to leapfrog our current knowledge by measuring all groups against a socially and culturally biased standard with environmental factors we can't control and that we don't truly understand.