[em-bee]

yes, but this only goes as far as being able to explain the difference between humans and other animals. it doesn't at all explain the differences between different humans because other factors are so strong that so far we have not been able to isolate genetic differences as a factor in human intelligence. even twin studies have been flawed in this regard.

[sokoloff]

If we had to wager whether there was any genetic component to intelligence differences among humans, I think the safe wager is on “there is some” over “there is none”.

[em-bee]

yes, but i'd also wager that it is completely drowned out by other factors. if genetics improve my intelligence by 1% and teaching can improve it by 10% then what's the point?

those genetics will only be a factor among those receiving no teaching at all, or those who receive the maximum teaching possible. but they will hardly factor in in the middle of the bell curve where every genetic advantage by one person can be outdone by another one putting in more effort. the difference then between you and me will be that your genetic advantage will allow you to reach the same result as me with less effort. there is practically no benefit for you. or the advantage is so small that we won't even notice most of the time. if at all.

any model that relies on genetic advantages as a factor only works if we assume that those naturally more intelligent automatically bubble to the top and are not held back by other factors, all which have the potential to nullify any advantages they may have had

[sokoloff]

I disagree with the last paragraph. If there are four factors that all combine to create an outcome, we don’t ignore factor 1 just because factors 2-4 can nullify any advantage.

My garden grows based on light, CO2, macro nutrients, and water. We don’t say “CO2 is not a factor in plant growth because deficits in water, nutrients, and light can prevent it from showing in overall outcome.”

[em-bee]

but that depends on how large the factor actually is. if it were 10% or more, then sure. but the fact that the very existence of a genetic factor is put into question, suggests that the factor, if it exists, is so small that it really is negligible.

another reason why we can ignore a genetic factor is that we can not influence it. or, that trying to influence it carries serious ethical implications.

it is also to small to serve as a tool to predict future performance.

[sokoloff]

The existence of a genetic component is put into question by some, but by no means all.

https://en.m.wikipedia.org/wiki/Heritability_of_IQ