The relation between rationality in science and rationality in moral discourse is of interest to philosophers and sociologists of science, to educators and moral philosophers. Apparently conflicting conceptions of rationality can be detected at the core of two current socio-educational controversies: the creationievolution controversy and that concerning “moral education.” This paper takes as its starting point the recorded views of participants in these controversies; exhibits the contradictions and their effect on the public; relates these contradictions to developments in the philosophy (...) and history of science; and suggests, in a preliminary way, one approach for dealing with the problem. (shrink)