You cited this reference up thread: "The Wilson Effect: The Increase in Heritability of IQ With Age". It should give you pause for your definition of heritability that this paper is saying it changes with age. As you point out a couple of comments later, genes don't change with age.

If you're going to cite heritability numbers, you have to use the technical definition of heritability (which is what these papers are using).

> Is this not what heritability means?

No, not at all.