Aristotle taught us that rhetoric has three components: what is said; who is saying it; and where it is being said. I thought of this while watching Charlie Nesson’s talk at a recent Berkman Center symposium on ‘truthiness’. As a teacher, Nesson has an almost legendary status, and you can see why from the way he does this talk. And as for location, well, the Berkman Center was essentially his idea. He also has the serene confidence that comes from being right at the top of his game: what other academic, for example, would seriously contemplate the notion of poker as a “mindsport” like chess?