George Orwell said this quote
“ A totalitarian society which succeeded in perpetuating itself would probably set us a schizophrenic system of thought, in which the laws of common sense held good in everyday life and in certain exact sciences, but could be disregarded by the politician, the historian, and the sociologist. Already there are countless people who would think it scandalous to falsify a scientific text-book, but would see nothing wrong in falsifying an historical fact. ”