I have a more detailed comment here: https://news.ycombinator.com/item?id=14957553 https://news.ycombinator.com/item?id=14957553 but basically since he gives no

I have a more detailed comment here: https://news.ycombinator.com/item?id=14957553 https://news.ycombinator.com/item?id=14957553 but basically since he gives no sense of how much he thinks the biological stuff actually matters, he has made the range of possible interpretations very wide. This carelessness (or intentional vagueness?) is anything but tactful. Tactful is controlling your message to not be so easily misunderstood. The science is not really in doubt, surely, but the magnitude of the effects in the full context of our lives and history and cultural norms is complicated. And figuring out how to use experimental data to improve policy is hard. The backlash is not surprising because, though he tried, he failed to be clear about what he means.