IN the so-called “outer chapters” of The Chuang Tzu (the book attributed to the Taoist philosopher Chuang Tzu) there is the parable of a man who fell asleep and dreamed he was a butterfly. On waking up, he started to wonder: Was he a man who dreamt that he was a butterfly, or a butterfly dreaming that he was a man? All along, I have assumed to be sui compos, in full possession of my faculties, sane, in other words. But when I woke up one morning to read a very serious post in a reputable online magazine that had one advocate of women’s rights warning against “good morning” greetings as a form of harassment, I started to doubt whether I had wormed my way in the night into some parallel universe, or whether I had fallen into the cuckoo’s nest!