I'm a data science department head. I've been trained to divide the world into supervised and unsupervised learning problems. Over the past few years, I've star

I'm a data science department head. I've been trained to divide the world into supervised and unsupervised learning problems. Over the past few years, I've started reading old books, and it's amazing how clever pre-WWW computer scientists were. A few pages of Knuth can reveal a deterministic and fast-running algorithm for a problem that I would otherwise approach with some ML library.