Rhetoric is all around us. It's what inspires armies, convicts criminals, and makes or breaks presidential candidates. And it isn't just the preserve of politicians. It's in the presentation to a key client, the half-time talk in the locker room, and the plea to your children to eat their vegetables. Rhetoric gives words power: it persuades and cajoles, inspires and bamboozles, thrills and misdirects. You have been using rhetoric yourself, all your life. After all, you know what a rhetorical question is, don't you?