Epigenetics is real but overhyped "If the claim is that environmental shocks leave durable biochemical marks on the DNA, and those marks survive the developmental demolition derby of early embryogenesis, and then survive again into the next generation’s germ cells, and then change phenotype in a measurable, replicable way, all those steps need to be demonstrated. What we have instead are a handful of noisy observational studies that would fail to impress even if the question were trivial, let alone one of the boldest claims in biology — namely, a partial rewriting of inheritance."
Twin studies: One thing the partial heretitarians have convince me of is that twin studies are not necessarily as powerful an argument as I had assumed. When I first heard the caution that identical twins reared apart still share significant environment if they are in the same or even similar (Canada/US) countries, I thought it a stretch and an excuse. Because the circumstances of being separated are often unusual or even dire, the parenting, socioeconomic status, diet, and home culture can differ widely. Yet it is true that much that is key to development is the same. Communicating things via signage, including diagrams for directions, are a way of knowing that is not known in all societies. The idea of having shelter might vary in America, but far more worldwide. Students enter school at the same age in Michigan and Mississippi, and might even have the same textbooks. Heck, the fact that they are given textbooks has developmental implications. From early years they will color in shapes, hear similar music. Even if one child does not have a TV or a computer they will see plenty of both and learn to decode the world from screens. I was wrong to dismiss it so thoroughly.
Nose ring theory revisited. It is a symbolic statement that one can be led around by fashion quite easily and thoroughly. This includes intellectual fashions. As these fashions are usually part of female culture, it is an advertisement that one can be led around by other women. This mostly applies online, as far as I can tell. As I wrote before, the women with nose rings I meet in real life seem more like lost souls than man-haters.