Don't you mean association does not imply rather than infer? Did you finish the 4th grade?
It's difficult to find human guinea pigs to randomly assign to get hg or not get hg. This has however been done on animals. One study on sheep was done on sheep and showed a huge correlation between Amalgam and tissue hg levels as well as health problems.Also why do people with Amalgam pour out huge levels of hg vapor as compared to controls?What are the levels in a workplace during coffee breaks? Maybe someone should investigate second hand hg as they did second hand smoke.
Many have shown major changes after Amalgam removal.Bjorkman found that saliva and fecal hg decreased by 90% upon amalgam removal.