Commenting on what constitutes a good opening in argumentative writing, Wallace offers:

A good opener, first and foremost, fails to repel. Right? So it’s interesting and engaging. It lays out the terms of the argument, and, in my opinion, should also in some way imply the stakes. Right? Not only am I right, but in any piece of writing there’s a tertiary argument: why should you spend your time reading this? Right? “So here’s why the following issue might be important, useful, practical.” I would think that if one did it deftly, one could in a one-paragraph opening grab the reader, state the terms of the argument, and state the motivation for the argument. I imagine most good argumentative stuff that I’ve read, you could boil that down to the opener.

Garner, the interviewer, follows this up by asking “Do you think of most pieces as having this, in Aristotle’s terms, a beginning, a middle, and an end—those three parts?”

I think, like most things about writing, the answer lies on a continuum. I think the interesting question is, how much violence do you do to the piece if you reprise it in a three-act . . . a three-part structure.