Quote (Black XistenZ @ Dec 8 2021 12:17am)
I just googled it and all sources confirm the term heritability to refer to the degree that genetic variability explains differences in phenotype, as opposed to environmental factors such as nutrition, upbringing or memetics.
https://www.britannica.com/science/heritabilityhttps://en.wikipedia.org/wiki/HeritabilitySo either all these definitions are incorrect, or your claim that "heritability" is an umbrella term which refers to any form of passing on traits from one generation to the next is plain wrong.
Sure, I already alluded to the upbringing factor. However, I thought that science had recently moved slightly toward the genetic component playing a larger role than previously thought. Still less than 50% genetics, to be sure, but more than just a negligible amount.
In statistics and such heritability doesn't purely refer to genes. It refers to anything that can pass down.
Additionally, genetic heritability is not purely genetic because it requires accounting for other factors. For instance, if you are measuring heritability of height on a plant and give it good soil, height might be highly heritable, but if you give each plant poor soil so they can only grow a few inches, then height isn't going to be heritable at all. Heritability is dependent on circumstance, and circumstance is also frequently heritable.
It's a more complex topic than simply genetic differences, but that isn't going to be captured in a dictionary definition.
The answer to the question of "does genetics impact intelligence" is "yes, absolutely. Downs syndrome exists". But the answer to the question "are genes a significant factor in intelligence in an otherwise normal individual when compared to other easily changeable factors like upbringing, financial circumstance, and day of testing" is "no".
This post was edited by NetflixAdaptationWidow on Dec 8 2021 12:27am