On Wright's Argument against Deflationism

I consider Crispin Wright's much discussed ‘inflationary’ argument against deflationism about truth. I identify a principle apparently involved in it, which I call Wright's principle, and present Wright's argument with the following dilemma. If Wright's principle is sound, the deflationist has a straightforward rejoinder to Wright's argument. If Wright's principle is unsound, the central part of Wright's argument, concerned with how ‘true’ commutes with the negation operator, is rendered superfluous. I conclude that Wright's argument is either a straightforward failure or completely otiose.