@Cupcake @Lightlyseared Thanks for the references! You guys are awesome.
To all the people who questioned if you “need evidence for something that is common sense”, it was once common sense that of course it makes sense to bleed people with high fevers, and that the Sun orbits the Earth, and such things.
I do not really question about flossing, though. I am undecided—on one hand, it is widely recommended and it does make sense, on the other it seems to be a bit of a cultural thing (much more common in the US than in Finland, say) without immediately noticeable effect and I am not sure if the common sense about the added benefit to regularly brushing really makes sense after all.
In my world, how you explore such undecidedness (is that a word?) about common sense is science. I was too lazy to search for references myself, so I figured I’ll start asking Fluther.
I’ll try and remember to post an overview of those articles linked after I have read them.