Template:Are You Sure/May 1

• ... that during the Second World War, British codebreaker and mathematician William Thomas "Bill" Tutte (1917–2002) made a brilliant and fundamental advance in cryptanalysis of the Lorenz cipher, a major Nazi German cipher system which was used for top-secret communications within the Wehrmacht High Command, and that the high-level strategic nature of the intelligence obtained through the subsequent bulk decrypting of Lorenz-enciphered messages contributed greatly, perhaps even decisively, to the defeat of Nazi Germany?

• ... that cryptographic numina were once explained away as St. Elmo's Fire and various other natural phenomena?