What is Good Science?
The criterion that establishes the superiority of one model or theory over its competitors is fertility. By fertility we mean this: a theory or model of natural reality is fertile when it gives rise to a progressive research program, when it guides scientists in performing experiments that lead to new knowledge. The Darwinian model has proven itself fertile for a century and a half now. (Peters and Hewlett, "Theology, Religion, and Intelligent Design," Not in our Classrooms, ed. Eugenie Scott and Glenn Branch, Beacon Press, 2006, 76-77).