I never deny. I never contradict. I sometimes forget.
Benjamin Disraeli
There is only one thing a philosopher can be relied upon to do, and that is to contradict other philosophers.
William James
A man never tells you anything until you contradict him.
George Bernard Shaw
I always love to quote Albert Einstein because nobody dares contradict him.
Studs Terkel
Do I contradict myself? Very well, then I contradict myself, I am large, I contain multitudes.
Walt Whitman
The well bred contradict other people. The wise contradict themselves.
Oscar Wilde