With MZ controls, inconclusive = anything other than a clear negative result. As for one with high power, can I have a link?
Pretty selective with your evidence standards. Energy intake/expenditure and obesity are obviously based in thermodynamics.
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Come on now: http://www.fathead-movie.com/index.php/2014/11/03/toilet-humor-and-the-how-vs-why-of-getting-fat/ … & http://slatestarcodex.com/2015/01/12/the-physics-diet/ …. In short, we don't have good ways of measuring either.
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Anyway, my main point was that the case for diet and lifestyle affecting health is lacking *good* evidence. In the case...
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These interventions don't work because people can't easily change their habits, not because the habits aren't causal.
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...of smoking I'm not saying there is not a causal relationship, but *good* evidence for such is lacking.
End of conversation
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