In answer to the many commenters who objected to the original thrust of the "Huh?" post, I only point out the lead sentence of the paragraph:
Before the grand jury, Mr. Fitzgerald asked me questions about Mr. Cheney. He asked, for example, if Mr. Libby ever indicated whether Mr. Cheney had approved of his interviews with me or was aware of them. The answer was no.
If I was misled in my interpretation, it was by that sentence. Fitzgerald is not asking questions about Mr. Libby at that point, according to Miller, he's asking questions about Cheney. I agree that the monosyllabic certainty specifically applies to Libby, but the question that remains is--why, in a paragraph about questions about Cheney, is the only example given a question about Libby?