What I said didn't really make sense -- f.test(f) is a concrete example so how am I generalizing? What I meant was: in the general case of expressions that cont

What I said didn't really make sense -- f.test(f) is a concrete example so how am I generalizing? What I meant was: in the general case of expressions that contain multiple references to the same variable it might, for instance f.testTwo(f = newF, f)