how to deal with revisionism?
tokenadult: The Holocaust deniers are definitely wrong too, just as are the people who don't credit the evidence for biological evolution. And anyone who thinks that medically administered vaccines are more dangerous than measles, pertussis, or seasonal flu is crazy. The harder case is vaccination against chicken pox, a disease with lower mortality and morbidity.To answer your methodological question about how to tell the difference between competing ideas, learn to read the peer-reviewed scientific journals on each subject. Now that the Public Library of Science (PLoS) journals all have open online access, it's easier than ever to practice reading scientific literature. See Peter Norvig's guide to reading scientific researchhttp://norvig.com/experiment-design.htmlfor what to look for while reading.