Is second hand smoke extremely harmful? Obviously it is, except science proceeded to show it doesn't seem to be. http://www.slate.com/articles/health_and_scien

Is second hand smoke extremely harmful? Obviously it is, except science proceeded to show it doesn't seem to be. http://www.slate.com/articles/health_and_science/medical_examiner/2017/02/secondhand_smoke_isn_t_as_bad_as_we_thought.html http://www.slate.com/articles/health_and_science/medical_exa... Is dietary cholesterol harmful? Obviously it is, except no experiment or even commonly advanced scientific hypothesis ever said it was. The hypothesis was that saturated fat intake raised blood cholesterol levels which in turn lead to more heart disease. But common wisdom was that somehow this meant egg yolks must be deadly. And shrimp. Oh, and then the saturated fat hypothesis didn't replicate well. And so forth. In contrast to your sentiment, I wish we actually based more policy on well replicated science, rather than what is "obvious."