During a power outage, candles sell like hot cakes.

So he came down from his tower and called his knights. Lordings, —he said — to arms; the Emperour Divoun beleaguers us within our walls. Now let us make three sallies brave and sure. The first I will outlead myself.

That was driven home late last year, when a malicious software program thought to have been unleashed by a criminal gang in Eastern Europe suddenly appeared after easily sidestepping the world’s best cyberdefenses.

Take the libationer of the Imperial College, for instance, who is my tutor.