Strangely enough, scientist Futuyama (think that’s right) world renown(even if not correctly spelled) did not realize they were fraudulent until around 2001 I think when he reissued a biology textbook. So even very bright people in the sciences are not all up to snuff. I too remember seeing them in my textbooks back in the 60’s and 70’s, and my sons’ in the 80’s and 90’s.