Taylor told a congressional committee, "that the science of handling pig-iron is so great that the man who is … physically able to handle pig-iron and is sufficiently phlegmatic and stupid to choose this for his occupation is rarely able to comprehend the science of handling pig-iron."
Taylor cited in: David Montgomery (1989) The Fall of the House of Labor: The Workplace, the State, and American Labor Activism, 1865-1925. p. 251