I'm not sure XOR/^ was added by Ken himself because it is not in his original B language and while the earliest C compiler can parse it, it can't generate code

I'm not sure XOR/^ was added by Ken himself because it is not in his original B language and while the earliest C compiler can parse it, it can't generate code for it. I think it was Steve Johnson or Dennis Ritchie. Now B originally did have a ^ but that stood for OR because | was in the lower case region of ASCII.