Gwern, is this your whole thing about 'everything is heritable'?:www.vicbiostat.org.au/heritability-opera-and-ice-falcon-thoughts-causation-and-causes-variation-some-aspect-disease
A seminar isn't a paper, so I really couldn't say. But if he's picking on twins, then I say 'meh' - the GCTA estimates for liability-threshold stuff compared to their twin estimates look about the same as the GCTA estimates for continuous traits compared to their twin estimates.
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