“One of the pleasures of hanging out with Mitchell is that he is, by self-identification, many kinds of nerd – a Star Trek nerd, a Doctor Who nerd, a map nerd, a taxonomy nerd, a tea nerd, a word nerd, and, for good measure, what you might call a nerd nerd: an enthusiast of nerdery of all kinds. At one point in our conversation, he speaks admiringly of sheep nerds.”