Germouse

1.  There are countless peer-reviewed studies which clearly demonstrate the effectiveness of fluoridation in the prevention of dental decay in entire populations. Numerous such studies have been cited for you previously in an effort to properly educate you on this issue.  I will gladly do so again if you wish.

2.  If you have proof that those who report accurate information on dental decay rates in Europe are "lying", then produce it.  Otherwise it is obvious whom is the one lying here.

3.  Randomised controlled trials are not feasible for large population based public health initiatives, such as fluoridation, and will never be performed for this initiative.  The recent Cochrane Review understood this and noted it in it its report.  It is a mystery as to why you seem so confused with this.  The data from cross-sectional, observational studies on fluoridation are perfectly acceptable within respected science and healthcare as accurate assessments of this initiative.

"However, there has been much debate around the appropriateness of GRADE
when applied to public health interventions, particularly for research questions where evidence from randomised controlled trials is never going to be available due to the unfeasibility of conducting such trials. Community water fluoridation is one such area."

---Water fluoridation for the prevention of dental caries (Review) 28
Copyright © 2015 The Cochrane Collaboration

3. Your personal opinion on the quality or validity of peer-reviewed scientific literature is irrelevant.  You have no qualifications to render any credible assessment of such literature.

Steven D. Slott, DDS