attributions are always suspect

Yes, they are. As are all assertions, or texts. It's just that so many people say this about Morgenbesser that I thought I'd mention it. It's like the fire-poker-shaking incident between Austin and Wittgenstein, obscure but tantalizing. Of course, eye witnesses to that event abound. But if the Morgenbesser event has crossed over into folklore, doesn't invalidate it. OTOH, because it's attached to famous names doesn't validate it either. Ah, well.