If one denies that, when the meaning is true, then the meant is what is so, one rejects propositional truth. If the rejection is universal, then it is the self-destructive proposition that there are no true propositions. If the rejection is limited to the dogmas, then it is just a roundabout way of saying that all the dogmas are false.
A Second Collection: Papers (ed. University of Toronto Press, 1996) - ISBN: 9780802079435