She doesn't know that. The fact that Miers hasn't been a judge doesn't mean she's totally unqualified. We don't know that, and that's the reason I'm not entirely happy, but I think I should give GW the benefit of the doubt. After all, Justice Rehnquist had no experience as a judge and worked as an Arizona lawyer before becoming a Supreme Court judge.
William Rehnquist was the most unlikely of appointments to the U.S. Supreme Court. He had no experience as a judge, and his boss, former President Richard Nixon, would embarrassingly refer to him as "Renchburg." But after serving more than 33 years on the Supreme Court, the last 19 as chief justice, Rehnquist proved to be among the greatest justices ever. He set the judicial standard at a very high level. Rehnquist took his seat on the Supreme Court on Jan. 7, 1972. A mere two months later, he brazenly disagreed with all the other justices and issued his first lone dissent.He went on to establish his reputation for dissenting alone, earning him the nickname "the Lone Ranger." Rehnquist was never one to seek accolades from the media or his colleagues, and penned more than 410 dissenting opinions over his marvelous career. LINK.