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> This lets you isolate what is purely personally genetic. No it doesn't. Not at all actually. https://en.wikipedia.org/wiki/Twin_study#Criticism https://en.w

• concordDance 5y ago
  I am indeed not an expert in this topic. But "Not at all actually" is drastically overstating the case. The very first critique is basically a nitpick. Yes, figures will be overestimated, but not taking into account air resistance when dropping your bowling ball off the tower of Piza isn't going to invalidate a conclusion that gravity is an accelerational force of at least 9m/s^2. In fact, with the exception of the statistical critique by the guy with a giant axe to grind it seems mostly nitpicking. Dr Axe Grinder seems to mostly be critiquing the additive model, claiming it gives wrong results, but more recent papers (such as Polderman et al (2015)) seem to say that the additive model is mostly correct. And given the latter paper is a many-author meta-analysis rather than an emotionally charged rant by a single professor and is much more recent, I'm inclined to go with the latter paper.