Maybe someone should hire Joe Biden to teach philosophy, or at least be in the classroom. You don’t have to be Ludwig Wittgenstein to appreciate the important philosophical lesson that our understanding can be bewitched by language. This can happen in a number of different ways, many of them illustrated daily by the President of the United States. One lesson revolves around the unpalatable truth that saying something is so does not make it so. Joe Biden gave a sterling illustration of that lesson the other day at one his weirdest press conferences to date. His withdrawal from Afghanistan, he barked…