It happened in February. It’s a video where a teacher, Warren Smith, is seen engaging in a conversation with a student who alleged that J.K. Rowling was transphobic. It quickly went viral. In less than five minutes, Smith, uncondescending, forces the student to rethink his position. The student admits he feels like an idiot after the pair discussed the phrasing and logical trajectory of the debate about the Harry Potter creator who has become persona non grata for her views on gender despite being an ardent leftist. This is utterly brilliant. A student accuses @jk_rowling of being transphobic. This teacher...