It's Best to Use Good Math (or Logic) When Picking on Paul Ryan's Bad Math

Jonathan Chait took a few swipes at Paul Ryan for his budget work and economic forecasts in a piece headlined "Paul Ryan Declares War Against Math." Most of Chait's shots are well-deserved, for example he notes Ryan's claims that the Obama deficits would lead to a surge in inflation and that Obamacare would cause health care costs to soar.

However one of the Chait's shots is definitely in the cheap seats. He tells readers:

"'Reality' [a sarcastic reference to Ryan's world view] is Ryan’s desc...