Michael Hammond, a sociologist of science at the University of Toronto, commenting on Piltdown:
"'what could have led so many eminent scientists to embrace such a forgery?' How is it that trained men, the greatest experts of their day, could look at a set of modern human bones-the cranial fragments-and 'see' a clear simian signature in them; and 'see' in an ape's jaw the unmistakable signs of humanity? The answers, inevitably, have to do with scientists' expectations and their effect of the interpretation of data."
 "A Framework of Plausibility for an Anthropological Forgery," Anthropology, vol. 3, p. 47 (1979)
 Roger Lewin (noted science journalist), Bones of Contention (New York, NY: A Touchstone Book published by Simon & Schuster Inc., 1987), p. 28 citing "Myths and Methods in Anatomy," Journal of the Royal College of Surgeons of Edinburgh, vol. II, no. 2, pp. 87-114 (1966), p. 61