Yes, Jean, I've noticed that about nutrition "science" too. I'm a physical scientist and using the "scientific method" is paramount in scientific research. Scientists can never prove something is true, we can only prove that it is not true, the goal is to choose an hypothesis that helps you rule out one possible cause at a time, then design and test another hypothesis. Collecting peoples' recollections of what they ate in 22 countries, plotting them and picking out the 7 that lie on a straight line through a random spray of data and ignoring the rest is opposite of science! You cannot prove that eating more fat causes heart disease, but controlled tests may be able to prove an hypothesis such as: eating 30% more saturated fat than the SAD control does not increase cholesterol levels (short term study) or the risk of developing heart disease (long term study).