I had a group of young, able philosophers who held teaching positions in various colleges. We covered several topics during the 6 weeks they were at Purdue, and toward the end we spent a week on the problem of evil. Among the group was a chap named Stephen Wykstra who had accepted a teaching position in philosophy at Calvin college. Wykstra talked only occasionally in the seminar, but when he became excited about some point or argument he would talk a good deal, sometimes having difficulty stopping talking, even after having fully made his point. At such times he would finally become aware that he had gone on too long, stop for moment, and then say, “Shut up, Wykstra!” And when he said that, to our surprise he would stop talking.

William Rowe, ‘Friendly Atheism, Skeptical Theism, and the Problem of Evil’, International Journal for Philosophy of Religion, vol. 5, no. 2 (April, 2006), p. 81