I understand that...
I was merely pointing out that a sharp eye caught a flaw in the code and minds got together to ‘test the system’ and when they proved to be correct, Yamamoto paid for it.
Also had heard that one of the stories Tom Dewey sat on was that he was aware we had broken the Japanese Code and possibly knew about PH in advance - for the sake of National Security - he basically sat on the info rather than use it in the 1944 race.
Imagine today a pol sitting on something as important as that ..... HA...
Dewey is a distant cousin of mine. My sister’s middle name was Dewey. The Dewey story is complicated. Roosevelt did not have prior knowledge of the Pearl Harbor attack. The Navy intercepted and decoded the infamous 14 message. The last part instructed the Japanese ambassador to destroy code machines and secret documents. The Navy correctly interpreted this to mean that war was imminent. They wanted to send a warning to all stations in the Pacific. They had a one kilowatt transmitter, and there was an electrical storm effecting the ionosphere. The Army, down the hall, had a 10 kW transmitter that could punch through, but rather than depending on the Army, they sent the warning en claire via Western Union. Hence the sight of a Japanese-American WU messenger delivering a warning telegram to Admiral Kimmel against the backdrop of the burning wreckage of Battleship row.
JN25, the Japanese Naval code in use at the time of Pearl Harbor was only about 10% broken by December 1941.
https://en.wikipedia.org/wiki/Japanese_naval_codes