Why do we think about certain things? Why do we do certain things? A three-day conference for the thinking person gets under way May 20 at the Moonrise Hotel in St. Louis. The St. Louis Annual Conference on Reasons and Rationality or SLACRR is sponsored by the University of Missouri–St. Louis and Washington University in St. Louis. It runs through May 22. The conference provides a forum for new work on practical and theoretical reason.