One example of where we are wrong is the commonly held belief that saccharin causes cancer. I mean, it's artificial, it's cheating to get sweetness, it has to b

One example of where we are wrong is the commonly held belief that saccharin causes cancer. I mean, it's artificial, it's cheating to get sweetness, it has to be bad right? Turns out the initial studies looking at bladder cancer in rats were misleading (lots of confounders). See this link for some basic information: https://www.cancer.gov/about-cancer/causes-prevention/risk/diet/artificial-sweeteners-fact-sheet https://www.cancer.gov/about-cancer/causes-prevention/risk/d... There is a further good writeup on it in the great book "The Biology of Cancer" by Robert A Weinberg, but it is a textbook.