I agree. Also, the prenatal environment (9 months of development!) and circumstances of birth, which both twins share, is not accounted for at all. Or rather, it is accounted for as "heritability" by twin studies, which is plainly wrong.
I agree. Also, the prenatal environment (9 months of development!) and circumstances of birth, which both twins share, is not accounted for at all. Or rather, it is accounted for as "heritability" by twin studies, which is plainly wrong.