One way of feeling infallible is not to keep a diary.
-- Orwell, "As I Please" # 3.
... He goes on to note that he has been "not so wrong as the Military Experts," who (1943) have been wrong about most things, and goes on to ask:
Where now are the men who told us those things? Still on the job, drawing fat salaries. Instead of the unsinkable battleship we have the unsinkable Military Expert.
They are stil afloat today.