Learning Logo in elementary school is how I was introduced to the concept of recursion. I have a vivid memory of the moment I made the breakthrough in understan

Learning Logo in elementary school is how I was introduced to the concept of recursion. I have a vivid memory of the moment I made the breakthrough in understanding in my head. 40 years later, I still want to giggle like a child when I find something in Emacs Lisp I can do more elegantly through recursion.