“Some readers may have noticed an icy little missive from Noam Chomsky ["Letters," December 3], repudiating the very idea that he and I had disagreed on the "roots" of September 11. I rush to agree. Here is what he told his audience at MIT on October 11:Clever of him to have spotted that (his favorite put-down is the preface 'Turning to the facts...') and brave of him to have taken such a lonely position. As he rightly insists, our disagreements are not really political.”