"In this life, Comrade Cootes," said Psmith, "we must always distinguish between the Unlikely and the Impossible. It was unlikely, as you say, that you would meet any friend of McTodd's in this out-of-the-way spot; and you rashly ordered your movements on the assumption that it was impossible. With what result? The cry goes round the Underworld, 'Poor old Cootes has made a bloomer?'"
"You needn't rub it in."
(from Leave It To Psmith, by Sir Pelham Wodehouse)