Jason Kottke links to a "Grammar Challenge" devised by David Foster Wallace and posted by a student of Wallace's, Amy McDaniel. What's noteworthy is that Kottke reports getting 0/10. Kottke is a thoughtful, creative English prose stylist, and Wallace thought that these questions were basic ones that should be taught in any undergraduate class. Kottke seems to think the problem lies with him. I take a different view: this test is useless. Just imagine a chemistry quiz that accomplished working chemists could not pass. What would you make of such a quiz? I myself would question its author's competence at devising chemistry quizzes.