By Tuesday, I hope you will have had the opportunity to investigate for yourself the health benefits of drinking water with the optimum amount of fluoride in it. I hope, too, that you have read the data on the benefits of adjusting the amount of fluoride in community water supplies and the statistics on its safety. Lacking that opportunity, I hope you have gone to someone knowledgeable about such studies and asked them to bring you their understanding of the research and conclusions and evaluate whether the studies and the resulting papers were valid. But maybe you don't have a friend like that, or couldn't find the research studies, or don't know where to get them.
Good research is tedious, and for many people, reading research papers can be monotonous at best.
There are professionals, though, to whom these papers are presented and who do this work for you. These are the editors and scientists of publications called peer-reviewed, or refereed journals. These scientists read the reports and determine the reliability of the research and whether the author's conclusions were correct based on the way the experiment was done. Then the researcher cut off the right back leg. The frog just lay there.