Yes, but there's always narrative driving the change of thought. Once we go back and forth a few times, it strains the credibility of those driving the narrati

Yes, but there's always narrative driving the change of thought. Once we go back and forth a few times, it strains the credibility of those driving the narrative. So Vietnam War, 'Low fat' diets of the 1980's (which led to high carb/sugar) diets etc..