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Dental School here listen up
On your teeth, between your teeth and your gums, is a 2.1 billion year old bacteria that poops acid that denatures your teeth, it was evolved to do exactly that, for the same reason a bird makes a nest, but does so very slowly, that bacteria won't grow in a bath of Flouride and the flouride will Neutralize the acid. While we're arguing, saliva can also neutralizes the acid, but not as well
Tests show that the Flouride in toothpastes is preventing cavities in teeth by disrupting the bacteria from making a permanant home where your toothbrush never gets to, explaining why flossing is also a great idea, it gets the fluoride where it needs to be. Also better to leave the flouride toothpaste suds between your teeth so it can do its work over a longer time
Untangling the base correlation between the measure of how much this person has taken flouride, and their IQ, is real, and for the most part a positive correlation, but not for the reasons that are obvious. It's not like the flouride is making you smarter, but instead, that people prefer to be with people with perfect teeth, and that preferential treatment corrisponds to opportunities for growth to be all you imagine you could be, and IQ really is just a measure of that. Also people from the swiftboat from the 3rd world didn't have flouride and their teeth are a trainwreck needing several years worth of middle class labor to fix it. So you can't just neural network a standard flouride use causes 5 IQ points increase. Because that's not what it is, it's the other way around, the having of the IQ means you were the one who lived in the place which gave you flouride because they were smart. It's not the raindrops causing the big storm cloud, it's the other way around
This is what makes data science and neural networks so hard, correlations are not enough. You won't let me observe skin color, so now I have to look at Flouride uptake to figure credit worthiness
