[paulryanrogers]

Trying to quantify genetics and intelligence is fraught because of history and ethics. We cannot put one twin in a box of food and water and the other in schools of varying quality. We also cannot clone Einstein and put them in various schools then test them.

Everyone has to live and grow within unjust societies. Some groups will suffer from racism, others may benefit. So it's going to be hard to prove much of anything without a lot of twins and decades of natural experiments.

The eugenics movements and Nazi experiments have also made the whole subject taboo.

Finally IQ is quite arbitrary and the tests evolve over time too.

[dennis_jeeves2]

>The eugenics movements and Nazi experiments have also made the whole subject taboo.

I know this.

>Finally IQ is quite arbitrary and the tests evolve over time too.

The IQ test may be flawed, but is the concept flawed?

Can you see any downside in not acknowledging differing intelligence among individuals?

(we know the downside of acknowledging it - right from the Natzis, to individuals who may not try hard enough to achieve something)

And oh well - there are both twin studying and studies on kid adopted by their non-biological parent. Given the taboo, it may not be easy to find them.