Academic life encourages specialization and technical thinking, and, oddly, there are few fields in which this is more true than philosophy. The discipline that should be of interest to everybody is often the most impenetrable. But occasionally brave philosophers do leap out of their professional lanes and illuminate things for the wider public. Hubert Dreyfus of Berkeley and Sean Dorrance Kelly of Harvard have just done this with their new book, “All Things Shining.” They t...