It turns out that there’s a lot to know about knowledge. Last week’s newsletter took off from Simon Winchester’s new book Knowing What We Know: The Transmission of Knowledge from Ancient Times to Modern Magic, my strategy being to move through various categories of knowledge. I mused upon what I called “practical knowledge” and “citizen’s knowledge,” the latter being the kind of knowledge necessary to navigate in our society, including the ability to take part in the kind of cultural conversation on which democracy depends. In the 1980’s, the literary critic E.D.