https://quoteinvestigator.com/2019/04/10/one-handed/
...the late Dr. John R. Steelman, Assistant to the President, recalled that he was in President Truman’s office one day with Dr. Edwin Nourse, the first Chairman of the Council of Economic Advisers. Dr. Nourse, as economists are wont to do, was saying, “On the one hand … but then, on the other hand,” etc. After he left, Truman told Steelman that he had no idea what Nourse had just told him. Truman then said, “John, do you think you could find me a one-armed economist?”
I’ve heard that if you line up all of the world’s economists they would never reach a conclusion.