You’d need to know the elasticity of intelligence and environments (5x on what scale? And does −5% really indicate outperformance on the genetics side?), which I’m not actually sure we know, and much of the ‘environment’ contribution is nonshared—immeasurable, random, we don’t know what it is. But hypothetically, you could do slightly better by trying to measure environment & control for it, yeah.
You’d need to know the elasticity of intelligence and environments (5x on what scale? And does −5% really indicate outperformance on the genetics side?), which I’m not actually sure we know, and much of the ‘environment’ contribution is nonshared—immeasurable, random, we don’t know what it is. But hypothetically, you could do slightly better by trying to measure environment & control for it, yeah.