A story, beautifully told by David Stockton that was culled from the transcript of an FOMC meeting in September 2005 and demonstrates the absurdity of projections (particularly in government-run institutions).
During World War II, [Nobel laureate, Ken] Arrow was assigned to a team of statisticians to produce long-range weather forecasts. After a time, Arrow and his team determined that their forecasts were not much better than pulling predictions out of a hat. They wrote their superiors, asking to be relieved of the duty. They received the following reply, and I quote "The Commanding General is well aware that the forecasts are no good. However, he needs them for planning purposes."