According to my version, Hacker News also invented currency inflation to increase the value of investments in flourine (which is undoubtedly a stealth startup in the latest YC batch)
This makes sense, given that water fluoridation is the most monstrously conceived and dangerous Communist plot we face.
To add some more sense to the discussion, I can assert what we learned in medical school: fluoride reduces cavity formation, however has a downside of making your teeth a bit yellowish.