"There’s a tax that you incur when you use the “N” word or the “F” word, and there are groups, whether it’s the NAACP or gay groups, who will make you pay it. But if you use the “R” word, you’ve picked the most vulnerable target, because people within the intellectual disabilities population are not going to return serve. They aren’t genetically designed to confront you the way other groups do."
January 1, 1970
https://en.wikiquote.org/wiki/Intellectual_disability