Occasionally at the library we hear, “This is a reference librarian. She knows everything.” We, of course, blush modestly and deny any such super powers. At that point, the speaker might say, “Well, ...

Without time, there would be no need for a memory. But without a memory, would there be such a thing as time? I don’t mean time in the sense that, say, physicists speak of it: the fourth dimension, ...