When it's probably best not to try to be witty
From a letter to the editor of The Economist, concerning congressional hearings in the U.S. on subprime mortgages:
"Taking up the reference to Oscar Wilde, an English man of letters, we could say that, in contemporary credit markets, the cynic knows the listed but not necessarily transactable price of everything but neither the probability of default not the loss given default coefficients of anything."