The Making of the Atomic Bomb: 25th Anniversary Edition

by Richard Rhodes

“You know, occasionally Fermi would tell you things, then you asked him, ‘But really, how? Show me.’ And then he would say, ‘Oh, well, I know this on c.i.f’ He spoke Italian.871 ‘C.i.f.’ meant ‘con intuito formidable,’ ‘with formidable intuition.’