Reply to: Dubois, R. N., 2000. Discussion of: E. Robert Thieler, Orrin H. Pilkey, Jr., Robert S. Young, David M. Bush, and Fei Chai, 2000. The Use of Mathematical Models to Predict Beach Behavior for U.S. Coastal Engineering: A Critical Review. Journal of Coastal Research, 16(1), 48-70. Journal of Coastal Research, 16(3), 946-949