Timothy Caulfield is a disgusting hypocrite and liar. He questions the quality of the study in question while failing to acknowledge that it is actually of much better quality than any of the "studies" (really just thinly disguised advertising) which fluoridationists rely on. He is relying on Robert Kehoe's "show me the data" mentality because there is no credible evidence for safety he can cite. He says the evidence "remains very convincing" while failing to present a shred of evidence, instead relying on a bogus appeal to authority, which is the typical approach of his kind. If he knew more about smoking he would know that it is a significant source of fluoride exposure, which is almost certainly part of the reason for the adverse health effects.