To every received truth there are exceptions. For example, it is often said that you can’t judge a book by its cover. But in the case of “The Socratic Method,” you can. Written by Ward Farnsworth, a classics scholar and dean of the University of Texas School of Law, and published by Godine, a Boston-based company known for both its editorial judgment and its artisan bookmaking, “The Socratic Method” is a beautiful object, with a costly sewn binding, an elegant font—and, more to the point, a jacket illustration that is richly suggestive of what is inside.