Guardian: Summer solstice. At dawn. What better time could there be for resolving a duel, albeit one not fought with flintlocks? The time is of my choosing, as the other party, though he accepted the challenge, would not agree terms. It is appropriate in another sense too, as this is the day with the longest hours of sunlight and therefore for I honour the sporting tradition it offers my opponent the best shot.
Three years ago, in the course of our debate about the best means of generating electricity,...