Jim Geraghty's collecting examples. Keep them in mind.
For myself: I'm not an economist, not a financier, and the heights of my mathematical understanding was a grad school class informally called How vendors will lie to you with statistics. but I knew back in July that we were going to hit double-digit unemployment, for a very simple and very cynical reason: because I knew that the people with political oversight over our economic and fiscal policy were not up to the job. If they had been they wouldn't have needed a perfect storm to gain political power in 2006, and consolidate it in 2008.
In other words, what was that phrase from our parents' day, again? Oh, right: "Would you buy a used car from this man?"
Crossposted to Moe Lane.