A colleague and I have been revisiting a wide range of issues associated with classroom interaction. I am finding new articles, confronting aspects of interaction that I still don’t understand very well, having my thinking on other topics challenged, and learning once more how invaluable and personally satisfying a pedagogical exchange with a colleague can be. My colleague recommended an article I had forgotten. The article is old but the point it makes is just as relevant today, if not more, than when it was made in 1987.